diff --git a/modules/src/em_code/insert.c b/modules/src/em_code/insert.c
index b45afcb33..86cbf9d3d 100644
--- a/modules/src/em_code/insert.c
+++ b/modules/src/em_code/insert.c
@@ -125,6 +125,7 @@ swttmp()
 	if (C_tmpfile == 0) {
 		static char tmpbuf[64];
 		register char *p = tmpbuf;
+		extern char *mktemp();
 
 		strcpy(p, C_tmpdir);
 		strcat(p, "/CodeXXXXXX");
diff --git a/modules/src/em_code/io.c b/modules/src/em_code/io.c
index 042f2d32a..8e59e5704 100644
--- a/modules/src/em_code/io.c
+++ b/modules/src/em_code/io.c
@@ -24,7 +24,7 @@ File		*C_ofp;
 #ifndef INCORE
 File		*C_tfr, *C_old_ofp;
 char		*C_tmpfile;
-char		*strcpy(), *strcat(), *mktemp();
+char		*strcpy(), *strcat();
 char		*C_ibuf = 0;
 long		C_current_out;
 #endif