diff --git a/lib/compress/zstd_compress.c b/lib/compress/zstd_compress.c
index 08d09aa49..732f39d31 100644
--- a/lib/compress/zstd_compress.c
+++ b/lib/compress/zstd_compress.c
@@ -3530,11 +3530,12 @@ ZSTD_CDict* ZSTD_createCDict_advanced(const void* dictBuffer, size_t dictSize,
 
 }
 
-ZSTDLIB_API ZSTD_CDict* ZSTD_createCDict_advanced2(const void* dict, size_t dictSize,
-                                                  ZSTD_dictLoadMethod_e dictLoadMethod,
-                                                  ZSTD_dictContentType_e dictContentType,
-                                                  ZSTD_CCtx_params* cctxParams,
-                                                  ZSTD_customMem customMem)
+ZSTDLIB_API ZSTD_CDict* ZSTD_createCDict_advanced2(
+        const void* dict, size_t dictSize,
+        ZSTD_dictLoadMethod_e dictLoadMethod,
+        ZSTD_dictContentType_e dictContentType,
+        const ZSTD_CCtx_params* cctxParams,
+        ZSTD_customMem customMem)
 {
     int const dedicatedDictSearch = cctxParams->enableDedicatedDictSearch &&
         ZSTD_dedicatedDictSearch_isSupported(
diff --git a/lib/zstd.h b/lib/zstd.h
index f8d5e84da..78c85dee4 100644
--- a/lib/zstd.h
+++ b/lib/zstd.h
@@ -1411,7 +1411,7 @@ ZSTDLIB_API ZSTD_CDict* ZSTD_createCDict_advanced2(
     const void* dict, size_t dictSize,
     ZSTD_dictLoadMethod_e dictLoadMethod,
     ZSTD_dictContentType_e dictContentType,
-    ZSTD_CCtx_params* cctxParams,
+    const ZSTD_CCtx_params* cctxParams,
     ZSTD_customMem customMem);
 
 ZSTDLIB_API ZSTD_DDict* ZSTD_createDDict_advanced(const void* dict, size_t dictSize,