diff --git a/codecs/gsm/Makefile b/codecs/gsm/Makefile
index 86f25f11af..06e96414a6 100755
--- a/codecs/gsm/Makefile
+++ b/codecs/gsm/Makefile
@@ -42,12 +42,14 @@ ifneq (${PROC},x86_64)
 ifneq (${PROC},ultrasparc)
 ifneq ($(shell uname -m),ppc)
 ifneq ($(shell uname -m),alpha)
+ifneq (${PROC},sparc64)
 OPTIMIZE+=-march=$(PROC)
 endif
 endif
 endif
 endif
 endif
+endif
 
 #The problem with sparc is the best stuff is in newer versions of gcc (post 3.0) only.
 #This works for even old (2.96) versions of gcc and provides a small boost either way.