diff --git a/Makefile b/Makefile
index aad66cb78..0cc979b75 100644
--- a/Makefile
+++ b/Makefile
@@ -151,7 +151,7 @@ ifdef ABC_USE_LIBSTDCXX
 endif
 
 $(info $(MSG_PREFIX)Using CFLAGS=$(CFLAGS))
-CXXFLAGS += $(CFLAGS)
+CXXFLAGS += $(CFLAGS) -std=c++17
 
 SRC  :=
 GARBAGE := core core.* *.stackdump ./tags $(PROG) arch_flags