diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 68f53b6015..5b60323a99 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -259,7 +259,7 @@ OBJS-$(CONFIG_PCM_MULAW_DECODER)       += pcm.o
 OBJS-$(CONFIG_PCM_MULAW_ENCODER)       += pcm.o
 
 OBJS-$(CONFIG_ADPCM_4XM_DECODER)       += adpcm.o
-OBJS-$(CONFIG_ADPCM_ADX_DECODER)       += adx.o
+OBJS-$(CONFIG_ADPCM_ADX_DECODER)       += adxdec.o
 OBJS-$(CONFIG_ADPCM_ADX_ENCODER)       += adxenc.o
 OBJS-$(CONFIG_ADPCM_CT_DECODER)        += adpcm.o
 OBJS-$(CONFIG_ADPCM_EA_DECODER)        += adpcm.o
diff --git a/libavcodec/adx.c b/libavcodec/adxdec.c
similarity index 100%
rename from libavcodec/adx.c
rename to libavcodec/adxdec.c