diff --git a/lib/easy.c b/lib/easy.c
index 99cbd970ea..b90757d947 100644
--- a/lib/easy.c
+++ b/lib/easy.c
@@ -130,7 +130,7 @@ curl_realloc_callback Curl_crealloc = (curl_realloc_callback)realloc;
 curl_strdup_callback Curl_cstrdup = (curl_strdup_callback)system_strdup;
 curl_calloc_callback Curl_ccalloc = (curl_calloc_callback)calloc;
 #if defined(_WIN32) && defined(UNICODE)
-curl_wcsdup_callback Curl_cwcsdup = Curl_wcsdup;
+curl_wcsdup_callback Curl_cwcsdup = (curl_wcsdup_callback)Curl_wcsdup;
 #endif
 
 #if defined(_MSC_VER) && defined(_DLL)
@@ -158,7 +158,7 @@ static CURLcode global_init(long flags, bool memoryfuncs)
     Curl_cstrdup = (curl_strdup_callback)system_strdup;
     Curl_ccalloc = (curl_calloc_callback)calloc;
 #if defined(_WIN32) && defined(UNICODE)
-    Curl_cwcsdup = (curl_wcsdup_callback)_wcsdup;
+    Curl_cwcsdup = (curl_wcsdup_callback)Curl_wcsdup;
 #endif
   }
 
diff --git a/tests/libtest/memptr.c b/tests/libtest/memptr.c
index ab72aa7725..ed6556a107 100644
--- a/tests/libtest/memptr.c
+++ b/tests/libtest/memptr.c
@@ -41,7 +41,7 @@ curl_realloc_callback Curl_crealloc = (curl_realloc_callback)realloc;
 curl_strdup_callback Curl_cstrdup = (curl_strdup_callback)strdup;
 curl_calloc_callback Curl_ccalloc = (curl_calloc_callback)calloc;
 #if defined(_WIN32) && defined(UNICODE)
-curl_wcsdup_callback Curl_cwcsdup = wcsdup;
+curl_wcsdup_callback Curl_cwcsdup = (curl_wcsdup_callback)_wcsdup;
 #endif
 
 #if defined(_MSC_VER) && defined(_DLL)