diff --git a/libavcodec/adpcm.h b/libavcodec/adpcm.h
index 3a054c0e84..16facb6d0f 100644
--- a/libavcodec/adpcm.h
+++ b/libavcodec/adpcm.h
@@ -26,6 +26,8 @@
 #ifndef AVCODEC_ADPCM_H
 #define AVCODEC_ADPCM_H
 
+#include <stdint.h>
+
 #define BLKSIZE 1024
 
 typedef struct ADPCMChannelStatus {