diff --git a/Makefile b/Makefile
index 727b4d10..af641558 100644
--- a/Makefile
+++ b/Makefile
@@ -88,7 +88,7 @@ FLAGS += -DLLVM_VERSION=$(LLVM_VERSION)
 
 LLVM_NEEDS_CXX14="100"
 ifeq (,$(findstring $(LLVM_VERSION),$(LLVM_NEEDS_CXX14)))
-CPPFLAGS += -std=c++14
+CPPFLAGS += -std=c++1y # GCC 5 does not support -std=c++14 flag
 else
 CPPFLAGS += -std=c++11
 endif