diff --git a/tests/decodecorpus.c b/tests/decodecorpus.c
index af961bfd0..a46fc24d8 100644
--- a/tests/decodecorpus.c
+++ b/tests/decodecorpus.c
@@ -185,7 +185,7 @@ BYTE SEQUENCE_LLCODE[ZSTD_BLOCKSIZE_MAX];
 BYTE SEQUENCE_MLCODE[ZSTD_BLOCKSIZE_MAX];
 BYTE SEQUENCE_OFCODE[ZSTD_BLOCKSIZE_MAX];
 
-unsigned WKSP[1024];
+unsigned WKSP[HUF_WORKSPACE_SIZE_U32];
 
 typedef struct {
     size_t contentSize; /* 0 means unknown (unless contentSize == windowSize == 0) */