diff --git a/lang/cem/libcc/stdio/fillbuf.c b/lang/cem/libcc/stdio/fillbuf.c
index 9f2cd9ec1..37d4a2e72 100644
--- a/lang/cem/libcc/stdio/fillbuf.c
+++ b/lang/cem/libcc/stdio/fillbuf.c
@@ -1,6 +1,8 @@
 /* $Header$ */
 #include <stdio.h>
 
+char *malloc();
+
 _fillbuf(iop)
 register FILE *iop;
 {