diff --git a/dlls/ntprint/ntprint.c b/dlls/ntprint/ntprint.c
index e7779ba6b1b..b8166661854 100644
--- a/dlls/ntprint/ntprint.c
+++ b/dlls/ntprint/ntprint.c
@@ -36,7 +36,7 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(ntprint);
 
-HINSTANCE NTPRINT_hInstance = NULL;
+static HINSTANCE NTPRINT_hInstance = NULL;
 
 typedef struct {
   LPMONITOR_INFO_2W mi2;    /* Buffer for installed Monitors */