diff --git a/ACE/include/makeinclude/platform_linux_clang.GNU b/ACE/include/makeinclude/platform_linux_clang.GNU
index c810f90f95eb7..2f251d0858675 100644
--- a/ACE/include/makeinclude/platform_linux_clang.GNU
+++ b/ACE/include/makeinclude/platform_linux_clang.GNU
@@ -43,17 +43,11 @@ endif
 
 ifneq ($(c++std),)
   CCFLAGS += -std=$(c++std)
-endif
-
-ifeq ($(c++20),1)
+else ifeq ($(c++20),1)
   CCFLAGS += -std=c++20
-endif
-
-ifeq ($(c++17),1)
+else ifeq ($(c++17),1)
   CCFLAGS += -std=c++17
-endif
-
-ifeq ($(c++14),1)
+else ifeq ($(c++14),1)
   CCFLAGS += -std=c++14
 endif