Const
diff --git a/lib/compress/zstd_compress.c b/lib/compress/zstd_compress.c
index 147a266..c6d72f5 100644
--- a/lib/compress/zstd_compress.c
+++ b/lib/compress/zstd_compress.c
@@ -413,7 +413,7 @@
return CCtxParams->forceWindow;
case ZSTD_p_forceAttachDict : {
- ZSTD_dictAttachPref_e pref = (ZSTD_dictAttachPref_e)value;
+ const ZSTD_dictAttachPref_e pref = (ZSTD_dictAttachPref_e)value;
CLAMPCHECK(pref, ZSTD_dictDefaultAttach, ZSTD_dictForceCopy);
CCtxParams->attachDictPref = pref;
return CCtxParams->attachDictPref;