diff --git a/src/s/osf1.h b/src/s/osf1.h
index bf6fb02f027..51a8632d5db 100644
--- a/src/s/osf1.h
+++ b/src/s/osf1.h
@@ -20,16 +20,3 @@
 #define INTERRUPTIBLE_IO
 
 #define SYSV_SYSTEM_DIR
-
-/* Declare malloc and realloc in a way that is clean.
-   But not in makefiles!  */
-
-#ifndef NOT_C_CODE
-#ifndef THIS_IS_YMAKEFILE
-/* We need these because pointers are larger than the default ints.  */
-#include <alloca.h>
-#include <string.h>
-extern void *malloc (), *realloc ();
-extern long *xmalloc (), *xrealloc ();
-#endif
-#endif