diff --git a/plugins/GSdx/Window/GSWndWGL.cpp b/plugins/GSdx/Window/GSWndWGL.cpp
index cf9e02e031..41c925b0b8 100644
--- a/plugins/GSdx/Window/GSWndWGL.cpp
+++ b/plugins/GSdx/Window/GSWndWGL.cpp
@@ -34,7 +34,7 @@ static void win_error(const wchar_t* msg, bool fatal = true)
 		MessageBox(NULL, msg, L"ERROR", MB_OK | MB_ICONEXCLAMATION);
 		throw GSDXRecoverableError();
 	} else {
-		fprintf(stderr, "ERROR:%s\n", msg);
+		fprintf(stderr, "ERROR:%ls\n", msg);
 	}
 }