diff --git a/src/Makefile.am b/src/Makefile.am
index c217f9a957fbf6d1a350594c125f096f5731d409..f7968c83df401901d13e12caf4678f44e24ce803 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -13,7 +13,7 @@ test_gradient_method_SOURCES = \
 check-am:
 	./test-gradient-method
 
-AM_CXXFLAGS = -Wall -Wextra
+AM_CXXFLAGS = -Wall -Wextra -Wno-unused-parameter
 
 AM_CPPFLAGS = \
 	$(DUNE_CPPFLAGS) \