diff --git a/libavcodec/vc2enc_dwt.h b/libavcodec/vc2enc_dwt.h
index af6fe3e2a2..7fbbfbe0ed 100644
--- a/libavcodec/vc2enc_dwt.h
+++ b/libavcodec/vc2enc_dwt.h
@@ -25,7 +25,7 @@
 #include <stddef.h>
 #include <stdint.h>
 
-typedef int16_t dwtcoef;
+typedef int32_t dwtcoef;
 
 enum VC2TransformType {
     VC2_TRANSFORM_9_7    = 0,   /* Deslauriers-Dubuc (9,7)  */