diff --git a/clients/common/nm-client-utils.c b/clients/common/nm-client-utils.c
index 4d356edbbe..cf8b478560 100644
--- a/clients/common/nm-client-utils.c
+++ b/clients/common/nm-client-utils.c
@@ -525,6 +525,7 @@ nmc_password_subst_char (void)
 
 #pragma GCC visibility push(hidden)
 NM_PRAGMA_WARNING_DISABLE("-Wdeclaration-after-statement")
+#undef NDEBUG
 #define NDEBUG
 #include "qrcodegen.c"
 NM_PRAGMA_WARNING_REENABLE