--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -63,7 +63,7 @@ if ("${CMAKE_SYSTEM_PROCESSOR}" MATCHES
         sumsq.c sumsq_port.c sumsq_sse2.c sumsq_sse2_assist.s sumsq_mmx.c
         sumsq_mmx_assist.s cpu_features.s cpu_mode_x86.c)
 elseif ("${CMAKE_SYSTEM_PROCESSOR}" MATCHES "power.*")
-    add_definitions ("-fno-common -faltivec")
+    add_definitions ("-fno-common -maltivec")
     set (LIBFEC_MLIBS viterbi27_av.c viterbi29_av.c viterbi39_av.c
         viterbi615_av.c	encode_rs_av.c dotprod_av.c sumsq_av.c peakval_av.c
         cpu_mode_ppc.c)
--- a/configure.in
+++ b/configure.in
@@ -65,7 +65,7 @@ i386|i486|i586|i686)
 	cpu_features.o cpu_mode_x86.o"
 	;;
 powerpc*)
-	ARCH_OPTION="-fno-common -faltivec"
+	ARCH_OPTION="-fno-common -maltivec"
 	MLIBS="viterbi27_av.o viterbi29_av.o viterbi39_av.o viterbi615_av.o \
 	encode_rs_av.o \
 	dotprod_av.o sumsq_av.o peakval_av.o cpu_mode_ppc.o"
