diff --git a/polymer/eduke32/Makefile.common b/polymer/eduke32/Makefile.common
index 50351c3e0..2d2880a56 100644
--- a/polymer/eduke32/Makefile.common
+++ b/polymer/eduke32/Makefile.common
@@ -471,7 +471,7 @@ ifneq (0,$(RELEASE))
 
     ifneq (0,$(LTO))
         COMPILERFLAGS += -DUSING_LTO
-        COMMONFLAGS += -flto -fno-lto-odr-type-merging
+        COMMONFLAGS += -flto
     endif
 else
     ## Debugging enabled
@@ -660,6 +660,12 @@ ifeq (1,$(strip $(shell expr $(GCC_MAJOR) \>= 4)))
     L_SSP := -lssp
 endif
 
+ifeq (1,$(strip $(shell expr $(GCC_MAJOR) \>= 5)))
+    ifneq (0,$(LTO))
+        COMMONFLAGS += -fno-lto-odr-type-merging
+    endif
+endif
+
 # NOTE: If your setup doesn't have libstdc++, you can try using libsupc++.
 # Search for STDCPPLIB below and change it to -lsupc++.