1 files changed, 1 insertions, 1 deletions
diff --git a/str_fns.h b/str_fns.h
index d580231..4d005e5 100644
--- a/str_fns.h
+++ b/str_fns.h
@@ -1,7 +1,7 @@
 bool str_copy( char *dststr, char *srcstr, size_t max_chars ){
     if ( max_chars <= 0 )
         return false;
-    if ( srcstr == NULL )
+    if ( srcstr == NULL || dststr == NULL )
         return false;
     size_t src_len = (size_t)strnlen( srcstr, max_chars );
     if ( src_len <= 0 )