diff --git a/lang/basic/src/bem.h b/lang/basic/src/bem.h
index deb6eb435..eb1435802 100644
--- a/lang/basic/src/bem.h
+++ b/lang/basic/src/bem.h
@@ -3,6 +3,7 @@
  * See the copyright notice in the ACK home directory, in the file "Copyright".
  */
 
+#include <stdlib.h>
 #include <ctype.h>
 #include <string.h>
 #include <signal.h>
@@ -73,11 +74,3 @@ extern Linerecord *currline;
 
 extern char *itoa();
 extern char *salloc();
-
-extern char *strcpy();
-extern char *strcat();
-#if __STDC__
-#include <stdlib.h>
-#else
-extern char *malloc();
-#endif
diff --git a/lang/basic/src/build.lua b/lang/basic/src/build.lua
index f4d6b94a8..eff53d6e9 100644
--- a/lang/basic/src/build.lua
+++ b/lang/basic/src/build.lua
@@ -24,6 +24,7 @@ cprogram {
 		matching(filenamesof("+llgen"), "%.c$"),
 	},
 	deps = {
+		"./*.h",
 		"+llgen",
 		"+tokentab_h",
 		"h+emheaders",