diff --git a/src/phosh.c b/src/phosh.c
index 260223cf25359ecaa0b0ce1c0afe33b68dade864..0fa0b75871e628daf3c69776721da35bb96e5107 100644
--- a/src/phosh.c
+++ b/src/phosh.c
@@ -87,8 +87,7 @@ typedef struct _PhoshShell
 G_DEFINE_TYPE_WITH_PRIVATE (PhoshShell, phosh_shell, G_TYPE_OBJECT)
 
 /* Shell singleton */
-PhoshShell *_phosh;
-
+static PhoshShell *_phosh;
 
 static void layer_surface_configure(void *data,
     struct zwlr_layer_surface_v1 *surface,