diff --git a/package/multimedia/ffmpeg/ffmpeg.mk b/package/multimedia/ffmpeg/ffmpeg.mk
index dc572de900..bed37287af 100644
--- a/package/multimedia/ffmpeg/ffmpeg.mk
+++ b/package/multimedia/ffmpeg/ffmpeg.mk
@@ -150,7 +150,7 @@ endif
 # Set powerpc altivec appropriately
 ifeq ($(BR2_powerpc),y)
 ifeq ($(BR2_powerpc_7400)$(BR2_powerpc_7450)$(BR2_powerpc_970),y)
-FFMPEG_CONF_OPT -= --enable-altivec
+FFMPEG_CONF_OPT += --enable-altivec
 else
 FFMPEG_CONF_OPT += --disable-altivec
 endif