diff --git a/src/Makefile.am b/src/Makefile.am
index d99f281c822886043073d92321ef6043a72f89dc..7df5ffefbd16e4240ccf353f3cb13d493d5ef124 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -76,7 +76,8 @@ AM_CXXFLAGS = \
 	-Wno-tautological-compare \
 	-Wno-type-limits \
 	-Wno-unused-parameter \
-	-Wno-unused-variable
+	-Wno-unused-variable \
+	-Wno-unneeded-internal-declaration
 
 AM_CPPFLAGS = \
 	-DDUNE_FMatrix_WITH_CHECKING \
diff --git a/src/tests/Makefile.am b/src/tests/Makefile.am
index 899cb29bd26eb332c81ff85487f40ca1d62d7902..9f5b4f1943526466f4c46e6c112997a6448d7024 100644
--- a/src/tests/Makefile.am
+++ b/src/tests/Makefile.am
@@ -51,8 +51,8 @@ AM_CXXFLAGS = \
 	-Wno-tautological-compare \
 	-Wno-type-limits \
 	-Wno-unused-parameter \
-	-Wno-unused-variable
-
+	-Wno-unused-variable \
+	-Wno-unneeded-internal-declaration
 AM_CPPFLAGS = \
 	-DDUNE_FMatrix_WITH_CHECKING \
 	$(DUNE_CPPFLAGS) \