diff --git a/mach/m68020/ce/mach.c b/mach/m68020/ce/mach.c
index d4e7e83c1..f829f4476 100644
--- a/mach/m68020/ce/mach.c
+++ b/mach/m68020/ce/mach.c
@@ -4,12 +4,14 @@
 #include <system.h>
 
 
+#ifdef DEBUG
 arg_error( s, arg)
 char *s;
 int arg;
 {
 	fprint( STDERR, "arg_error %s %d\n", s, arg);
 }
+#endif
 
 
 /*
diff --git a/mach/m68020/ce/mach.h b/mach/m68020/ce/mach.h
index 1cbd4f96c..6a19f6b5b 100644
--- a/mach/m68020/ce/mach.h
+++ b/mach/m68020/ce/mach.h
@@ -42,3 +42,7 @@
 
 
 #define small( x)	( 1 <= (x) && (x) <= 8)
+
+#ifndef DEBUG
+#define arg_error(s,i)
+#endif