Fix function definition.
diff --git a/lib/zip_source_file_win32_utf16.c b/lib/zip_source_file_win32_utf16.c
index 42fb531..f515528 100644
--- a/lib/zip_source_file_win32_utf16.c
+++ b/lib/zip_source_file_win32_utf16.c
@@ -78,7 +78,7 @@
 }
 
 
-HANDLE
+HANDLE __stdcall
 utf16_create_file(const char *name, DWORD access, DWORD share_mode, PSECURITY_ATTRIBUTES security_attributes, DWORD creation_disposition, DWORD file_attributes, HANDLE template_file) {
 #ifdef MS_UWP
     CREATEFILE2_EXTENDED_PARAMETERS extParams = {0};