diff --git a/src/Makefile.am b/src/Makefile.am
index 6dc771edc225e144412deb3f92e26ac8b3ef191f..66b6ed368f186376815370c4b0d6e5516d3af996 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -22,7 +22,10 @@ AM_CXXFLAGS = \
 	-Wall \
 	-Wextra \
 	-Wno-unused-parameter \
-	-Wno-overloaded-virtual
+	-Wno-overloaded-virtual \
+	-Wno-new-returns-null \
+	-Wno-unknown-warning-option \
+	-Wno-unknown-pragmas
 
 AM_CPPFLAGS = \
 	-DDUNE_FMatrix_WITH_CHECKING \