1 files changed, 1 insertions, 1 deletions
diff --git a/nasmlib.c b/nasmlib.c
index 86ed6c47..27179eba 100644
--- a/nasmlib.c
+++ b/nasmlib.c
@@ -627,7 +627,7 @@ void saa_fpwrite (struct SAA *s, FILE *fp)
     long len;
 
     saa_rewind (s);
-    while ( (data = saa_rbytes (s, &len)) )
+    while ( (data = saa_rbytes (s, &len)) != NULL )
 	fwrite (data, 1, len, fp);
 }