diff --git a/src/loadso/win32/SDL_sysloadso.c b/src/loadso/win32/SDL_sysloadso.c
index fe6d8bb17..34d7dc082 100644
--- a/src/loadso/win32/SDL_sysloadso.c
+++ b/src/loadso/win32/SDL_sysloadso.c
@@ -93,7 +93,7 @@ void *SDL_LoadFunction(void *handle, const char *name)
 	wchar_t *name_t = SDL_malloc((length + 1) * sizeof(wchar_t));
 	wchar_t *errbuf_t = SDL_malloc(512 * sizeof(wchar_t));
 
-	MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, name, -1, name_t, length);
+	MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, name, -1, name_t, length+1);
 
 	symbol = (void *)GetProcAddress((HMODULE)handle, name_t);
 	if ( symbol == NULL ) {