diff --git a/cpp/unix.c b/cpp/unix.c
index b3db364..400af35 100755
--- a/cpp/unix.c
+++ b/cpp/unix.c
@@ -97,7 +97,7 @@ memmove(void *dp, const void *sp, size_t n)
 {
 	unsigned char *cdp, *csp;
 
-	if (n<=0)
+	if (n==0)
 		return 0;
 	cdp = dp;
 	csp = (unsigned char *)sp;
diff --git a/src/sym.c b/src/sym.c
index e4a6e30..fab3962 100755
--- a/src/sym.c
+++ b/src/sym.c
@@ -313,8 +313,6 @@ Symbol mksymbol(int sclass, const char *name, Type ty) {
 
 /* vtoa - return string for the constant v of type ty */
 char *vtoa(Type ty, Value v) {
-	char buf[50];
-
 	ty = unqual(ty);
 	switch (ty->op) {
 	case INT:      return stringd(v.i);