diff --git a/AMDiS/other/include/Makefile_AMDiS.mk b/AMDiS/other/include/Makefile_AMDiS.mk
index 87e1eae36a9783d48bea2d6bef7d8d998b2d80d0..cd1788c928edb302efa44c77029dd9f8a48e1c96 100644
--- a/AMDiS/other/include/Makefile_AMDiS.mk
+++ b/AMDiS/other/include/Makefile_AMDiS.mk
@@ -108,7 +108,7 @@ endif
 # ============================================================================
 
 ifeq ($(strip $(DEBUG)), 0)
-       CPPFLAGS += -O3
+       CPPFLAGS += -O3 -DNDEBUG
 else
        CPPFLAGS += -g -O0 -DDEBUG=1
 endif