diff --git a/src/vim.h b/src/vim.h
index 14405dc..0a979e4 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -1986,6 +1986,9 @@
 # endif
 #endif
 
+#ifndef FEAT_NETBEANS_INTG
+# undef NBDEBUG
+#endif
 #ifdef NBDEBUG /* Netbeans debugging. */
 # include "nbdebug.h"
 #else