diff --git a/polymer/eduke32/Makefile.common b/polymer/eduke32/Makefile.common
index d6b110bfb..2704278a8 100644
--- a/polymer/eduke32/Makefile.common
+++ b/polymer/eduke32/Makefile.common
@@ -84,7 +84,7 @@ ifneq (0,$(RELEASE))
     endif
     ifneq (0,$(LTO))
         LIBS+= -flto
-        debug+= -flto
+        debug+= -DUSING_LTO -flto
     endif
 else
     # Debugging enabled
diff --git a/polymer/eduke32/source/animvpx.c b/polymer/eduke32/source/animvpx.c
index 16a72a6a3..a9cbdf736 100644
--- a/polymer/eduke32/source/animvpx.c
+++ b/polymer/eduke32/source/animvpx.c
@@ -208,10 +208,12 @@ const char *animvpx_nextpic_errmsg[] = {
 // retrieves one picture-frame from the stream
 //  pic format:  lines of [Y U V 0] pixels
 //  *picptr==NULL means EOF has been reached
-#ifdef DEBUGGINGAIDS
+#ifndef USING_LTO
+# ifdef DEBUGGINGAIDS
 ATTRIBUTE((optimize("O1")))
-#else
+# else
 ATTRIBUTE((optimize("O3")))
+# endif
 #endif
 int32_t animvpx_nextpic(animvpx_codec_ctx *codec, uint8_t **picptr)
 {