1 files changed, 1 insertions, 1 deletions
diff --git a/pw.c b/pw.c
index 672c149..05fa412 100644
--- a/pw.c
+++ b/pw.c
@@ -588,7 +588,7 @@ static int getznn(const char *str, char **err)
     *err = dsdup("number expected");
     return -1;
   }
-  if (val <= 0) {
+  if (val < 0) {
     *err = dsdup("non-negative value required");
     return -1;
   }