diff --git a/Source/exehead/Ui.c b/Source/exehead/Ui.c
index 5f47992b..0f62ab3a 100644
--- a/Source/exehead/Ui.c
+++ b/Source/exehead/Ui.c
@@ -1104,13 +1104,13 @@ static BOOL CALLBACK DirProc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lPar
 
     total = (unsigned) sumsecsfield(size_kb);
 
-#ifdef __GNUC__
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wmaybe-uninitialized" // available_set is checked first so available is initialized
 #endif
     if (available_set && available < total)
       error = NSIS_INSTDIR_NOT_ENOUGH_SPACE;
-#ifdef __GNUC__
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
 #pragma GCC diagnostic pop
 #endif