diff --git a/dev-qt/qt6-base/qt6_base-6.10.3.recipe b/dev-qt/qt6-base/qt6_base-6.10.3.recipe
index f29b01d71..d4968228b 100644
--- a/dev-qt/qt6-base/qt6_base-6.10.3.recipe
+++ b/dev-qt/qt6-base/qt6_base-6.10.3.recipe
@@ -150,8 +150,8 @@ BUILD()
 		-S $sourceDir \
 		-G Ninja \
 		-DCMAKE_BUILD_TYPE=Release \
-		-DCMAKE_C_FLAGS="-fPIC -D_DEFAULT_SOURCE" \
-		-DCMAKE_CXX_FLAGS="-fPIC -D_DEFAULT_SOURCE" \
+		-DCMAKE_C_FLAGS="-fPIC -D_DEFAULT_SOURCE -D_GNU_SOURCE" \
+		-DCMAKE_CXX_FLAGS="-fPIC -D_DEFAULT_SOURCE -D_GNU_SOURCE" \
 		-DCMAKE_INSTALL_PREFIX=$prefix \
 		-DBUILD_WITH_PCH=ON \
 		-DCMAKE_AUTOGEN_PARALLEL=1 \