diff --git a/package/ffmpeg/ffmpeg.mk b/package/ffmpeg/ffmpeg.mk
index 9d9209706a..ce285bcc60 100644
--- a/package/ffmpeg/ffmpeg.mk
+++ b/package/ffmpeg/ffmpeg.mk
@@ -554,6 +554,10 @@ FFMPEG_CONF_OPTS += --disable-optimizations
 FFMPEG_CFLAGS += -O0
 endif
 
+ifeq ($(BR2_ARM_INSTRUCTIONS_THUMB),y)
+FFMPEG_CFLAGS += -marm
+endif
+
 FFMPEG_CONF_ENV += CFLAGS="$(FFMPEG_CFLAGS)"
 FFMPEG_CONF_OPTS += $(call qstrip,$(BR2_PACKAGE_FFMPEG_EXTRACONF))