diff --git a/src/spicelib/parser/ifnewuid.c b/src/spicelib/parser/ifnewuid.c
index 6e4a4aae5..28cab599d 100644
--- a/src/spicelib/parser/ifnewuid.c
+++ b/src/spicelib/parser/ifnewuid.c
@@ -47,7 +47,7 @@ IFnewUid(void *ckt, IFuid * newuid, IFuid olduid, char *suffix, int type,
 #ifdef HAVE_ASPRINTF    	
 	asprintf(&newname, "%s", suffix);
 #else /* ~ HAVE_ASPRINTF */
-      if ( (newname = (char *) malloc(strlen(suffix) + 1 )) == NULL){
+      if ( (newname = (char *) malloc(strlen(suffix) + 2 )) == NULL){ 
 	fprintf(stderr,"malloc failed\n");
 	exit(1);
       }