Style fix
diff --git a/src/bc/program.c b/src/bc/program.c
index 9c87fb2..dc7818c 100644
--- a/src/bc/program.c
+++ b/src/bc/program.c
@@ -1290,7 +1290,7 @@
   char *read_name;
   BcInstPtr ip;
 
-  if (p == NULL) return BC_STATUS_INVALID_ARG;
+  if (!p) return BC_STATUS_INVALID_ARG;
 
   name = NULL;