diff --git a/mach/6500/as/Makefile b/mach/6500/as/Makefile
index 88bbdd3d6..8fde4cc3c 100644
--- a/mach/6500/as/Makefile
+++ b/mach/6500/as/Makefile
@@ -40,7 +40,7 @@ as:	$(COBJ) as.o
 
 as.y:	$(CDIR)/comm2.y
 	$(CPP) -P -I. -I$h $(DEF) $(CDIR)/comm2.y >as.y
-	@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
+	-@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
 
 lint:   $(CSRC) as.c
 	lint $(INCL) $(CSRC) as.c
diff --git a/mach/6800/as/Makefile b/mach/6800/as/Makefile
index 88bbdd3d6..8fde4cc3c 100644
--- a/mach/6800/as/Makefile
+++ b/mach/6800/as/Makefile
@@ -40,7 +40,7 @@ as:	$(COBJ) as.o
 
 as.y:	$(CDIR)/comm2.y
 	$(CPP) -P -I. -I$h $(DEF) $(CDIR)/comm2.y >as.y
-	@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
+	-@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
 
 lint:   $(CSRC) as.c
 	lint $(INCL) $(CSRC) as.c
diff --git a/mach/6805/as/Makefile b/mach/6805/as/Makefile
index 88bbdd3d6..8fde4cc3c 100644
--- a/mach/6805/as/Makefile
+++ b/mach/6805/as/Makefile
@@ -40,7 +40,7 @@ as:	$(COBJ) as.o
 
 as.y:	$(CDIR)/comm2.y
 	$(CPP) -P -I. -I$h $(DEF) $(CDIR)/comm2.y >as.y
-	@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
+	-@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
 
 lint:   $(CSRC) as.c
 	lint $(INCL) $(CSRC) as.c
diff --git a/mach/6809/as/Makefile b/mach/6809/as/Makefile
index 88bbdd3d6..8fde4cc3c 100644
--- a/mach/6809/as/Makefile
+++ b/mach/6809/as/Makefile
@@ -40,7 +40,7 @@ as:	$(COBJ) as.o
 
 as.y:	$(CDIR)/comm2.y
 	$(CPP) -P -I. -I$h $(DEF) $(CDIR)/comm2.y >as.y
-	@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
+	-@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
 
 lint:   $(CSRC) as.c
 	lint $(INCL) $(CSRC) as.c
diff --git a/mach/arm/as/Makefile b/mach/arm/as/Makefile
index 88bbdd3d6..8fde4cc3c 100644
--- a/mach/arm/as/Makefile
+++ b/mach/arm/as/Makefile
@@ -40,7 +40,7 @@ as:	$(COBJ) as.o
 
 as.y:	$(CDIR)/comm2.y
 	$(CPP) -P -I. -I$h $(DEF) $(CDIR)/comm2.y >as.y
-	@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
+	-@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
 
 lint:   $(CSRC) as.c
 	lint $(INCL) $(CSRC) as.c
diff --git a/mach/i386/as/Makefile b/mach/i386/as/Makefile
index 88bbdd3d6..8fde4cc3c 100644
--- a/mach/i386/as/Makefile
+++ b/mach/i386/as/Makefile
@@ -40,7 +40,7 @@ as:	$(COBJ) as.o
 
 as.y:	$(CDIR)/comm2.y
 	$(CPP) -P -I. -I$h $(DEF) $(CDIR)/comm2.y >as.y
-	@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
+	-@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
 
 lint:   $(CSRC) as.c
 	lint $(INCL) $(CSRC) as.c
diff --git a/mach/i80/as/Makefile b/mach/i80/as/Makefile
index 88bbdd3d6..8fde4cc3c 100644
--- a/mach/i80/as/Makefile
+++ b/mach/i80/as/Makefile
@@ -40,7 +40,7 @@ as:	$(COBJ) as.o
 
 as.y:	$(CDIR)/comm2.y
 	$(CPP) -P -I. -I$h $(DEF) $(CDIR)/comm2.y >as.y
-	@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
+	-@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
 
 lint:   $(CSRC) as.c
 	lint $(INCL) $(CSRC) as.c
diff --git a/mach/i86/as/Makefile b/mach/i86/as/Makefile
index 88bbdd3d6..8fde4cc3c 100644
--- a/mach/i86/as/Makefile
+++ b/mach/i86/as/Makefile
@@ -40,7 +40,7 @@ as:	$(COBJ) as.o
 
 as.y:	$(CDIR)/comm2.y
 	$(CPP) -P -I. -I$h $(DEF) $(CDIR)/comm2.y >as.y
-	@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
+	-@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
 
 lint:   $(CSRC) as.c
 	lint $(INCL) $(CSRC) as.c
diff --git a/mach/m68020/as/Makefile b/mach/m68020/as/Makefile
index 88bbdd3d6..8fde4cc3c 100644
--- a/mach/m68020/as/Makefile
+++ b/mach/m68020/as/Makefile
@@ -40,7 +40,7 @@ as:	$(COBJ) as.o
 
 as.y:	$(CDIR)/comm2.y
 	$(CPP) -P -I. -I$h $(DEF) $(CDIR)/comm2.y >as.y
-	@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
+	-@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
 
 lint:   $(CSRC) as.c
 	lint $(INCL) $(CSRC) as.c
diff --git a/mach/m68k2/as/Makefile b/mach/m68k2/as/Makefile
index 88bbdd3d6..8fde4cc3c 100644
--- a/mach/m68k2/as/Makefile
+++ b/mach/m68k2/as/Makefile
@@ -40,7 +40,7 @@ as:	$(COBJ) as.o
 
 as.y:	$(CDIR)/comm2.y
 	$(CPP) -P -I. -I$h $(DEF) $(CDIR)/comm2.y >as.y
-	@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
+	-@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
 
 lint:   $(CSRC) as.c
 	lint $(INCL) $(CSRC) as.c
diff --git a/mach/ns/as/Makefile b/mach/ns/as/Makefile
index 88bbdd3d6..8fde4cc3c 100644
--- a/mach/ns/as/Makefile
+++ b/mach/ns/as/Makefile
@@ -40,7 +40,7 @@ as:	$(COBJ) as.o
 
 as.y:	$(CDIR)/comm2.y
 	$(CPP) -P -I. -I$h $(DEF) $(CDIR)/comm2.y >as.y
-	@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
+	-@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
 
 lint:   $(CSRC) as.c
 	lint $(INCL) $(CSRC) as.c
diff --git a/mach/pdp/as/Makefile b/mach/pdp/as/Makefile
index 88bbdd3d6..8fde4cc3c 100644
--- a/mach/pdp/as/Makefile
+++ b/mach/pdp/as/Makefile
@@ -40,7 +40,7 @@ as:	$(COBJ) as.o
 
 as.y:	$(CDIR)/comm2.y
 	$(CPP) -P -I. -I$h $(DEF) $(CDIR)/comm2.y >as.y
-	@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
+	-@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
 
 lint:   $(CSRC) as.c
 	lint $(INCL) $(CSRC) as.c
diff --git a/mach/proto/as/Makefile b/mach/proto/as/Makefile
index 88bbdd3d6..8fde4cc3c 100644
--- a/mach/proto/as/Makefile
+++ b/mach/proto/as/Makefile
@@ -40,7 +40,7 @@ as:	$(COBJ) as.o
 
 as.y:	$(CDIR)/comm2.y
 	$(CPP) -P -I. -I$h $(DEF) $(CDIR)/comm2.y >as.y
-	@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
+	-@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
 
 lint:   $(CSRC) as.c
 	lint $(INCL) $(CSRC) as.c
diff --git a/mach/s2650/as/Makefile b/mach/s2650/as/Makefile
index 88bbdd3d6..8fde4cc3c 100644
--- a/mach/s2650/as/Makefile
+++ b/mach/s2650/as/Makefile
@@ -40,7 +40,7 @@ as:	$(COBJ) as.o
 
 as.y:	$(CDIR)/comm2.y
 	$(CPP) -P -I. -I$h $(DEF) $(CDIR)/comm2.y >as.y
-	@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
+	-@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
 
 lint:   $(CSRC) as.c
 	lint $(INCL) $(CSRC) as.c
diff --git a/mach/vax4/as/Makefile b/mach/vax4/as/Makefile
index 88bbdd3d6..8fde4cc3c 100644
--- a/mach/vax4/as/Makefile
+++ b/mach/vax4/as/Makefile
@@ -40,7 +40,7 @@ as:	$(COBJ) as.o
 
 as.y:	$(CDIR)/comm2.y
 	$(CPP) -P -I. -I$h $(DEF) $(CDIR)/comm2.y >as.y
-	@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
+	-@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
 
 lint:   $(CSRC) as.c
 	lint $(INCL) $(CSRC) as.c
diff --git a/mach/z80/as/Makefile b/mach/z80/as/Makefile
index 88bbdd3d6..8fde4cc3c 100644
--- a/mach/z80/as/Makefile
+++ b/mach/z80/as/Makefile
@@ -40,7 +40,7 @@ as:	$(COBJ) as.o
 
 as.y:	$(CDIR)/comm2.y
 	$(CPP) -P -I. -I$h $(DEF) $(CDIR)/comm2.y >as.y
-	@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
+	-@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
 
 lint:   $(CSRC) as.c
 	lint $(INCL) $(CSRC) as.c
diff --git a/mach/z8000/as/Makefile b/mach/z8000/as/Makefile
index 88bbdd3d6..8fde4cc3c 100644
--- a/mach/z8000/as/Makefile
+++ b/mach/z8000/as/Makefile
@@ -40,7 +40,7 @@ as:	$(COBJ) as.o
 
 as.y:	$(CDIR)/comm2.y
 	$(CPP) -P -I. -I$h $(DEF) $(CDIR)/comm2.y >as.y
-	@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
+	-@if test -f Expect ; then cat Expect ; else echo "expect 1 shift/reduce conflict"; fi
 
 lint:   $(CSRC) as.c
 	lint $(INCL) $(CSRC) as.c