diff --git a/libavcodec/prosumer.c b/libavcodec/prosumer.c
index 3fa9986a38..9143bb1bf4 100644
--- a/libavcodec/prosumer.c
+++ b/libavcodec/prosumer.c
@@ -38,7 +38,7 @@ typedef struct ProSumerContext {
 
     unsigned stride;
     unsigned size;
-    uint32_t lut[0x10000];
+    uint32_t lut[0x2000];
     uint8_t *initial_line;
     uint8_t *decbuffer;
 } ProSumerContext;