diff --git a/codecs/gsm/Makefile b/codecs/gsm/Makefile
index a81bcf985f..747de59e40 100755
--- a/codecs/gsm/Makefile
+++ b/codecs/gsm/Makefile
@@ -39,9 +39,11 @@ WAV49	= -DWAV49
 
 ifneq (${OSARCH},Darwin)
 ifneq (${PROC},x86_64)
+ifneq ($(shell uname -m),ppc)
 OPTIMIZE+=-march=$(PROC)
 endif
 endif
+endif
 
 PG =
 #PG = -g -pg
@@ -197,9 +199,11 @@ GSM_SOURCES =	$(SRC)/add.c		\
 		$(SRC)/table.c
 ifeq (${OSARCH},Linux)
 ifneq (${PROC},x86_64)
+ifneq ($(shell uname -m),ppc)
 GSM_SOURCES+=	$(SRC)/k6opt.s
 endif
 endif
+endif
 
 TOAST_SOURCES = $(SRC)/toast.c 		\
 		$(SRC)/toast_lin.c	\
@@ -246,9 +250,11 @@ GSM_OBJECTS =	$(SRC)/add.o		\
 		$(SRC)/table.o
 ifeq (${OSARCH},Linux)
 ifneq (${PROC},x86_64)
+ifneq ($(shell uname -m), ppc)
 GSM_OBJECTS+=	$(SRC)/k6opt.o
 endif
 endif
+endif
 
 TOAST_OBJECTS =	$(SRC)/toast.o 		\
 		$(SRC)/toast_lin.o	\