diff --git a/src/remote-viewer.c b/src/remote-viewer.c
index 7030c3e..435cad7 100644
--- a/src/remote-viewer.c
+++ b/src/remote-viewer.c
@@ -874,7 +874,7 @@ create_ovirt_session(VirtViewerApp *app, const char *uri, GError **err)
     if (state != OVIRT_VM_STATE_UP) {
         g_set_error(&error, VIRT_VIEWER_ERROR, VIRT_VIEWER_ERROR_FAILED,
                     _("oVirt VM %s is not running"), vm_name);
-        g_debug(error->message);
+        g_debug("%s", error->message);
         goto error;
     }
     g_object_set(app, "guest-name", vm_name, NULL);
@@ -913,7 +913,7 @@ create_ovirt_session(VirtViewerApp *app, const char *uri, GError **err)
     } else {
         g_set_error(&error, VIRT_VIEWER_ERROR, VIRT_VIEWER_ERROR_FAILED,
                     _("oVirt VM %s has unknown display type: %d"), vm_name, type);
-        g_debug(error->message);
+        g_debug("%s", error->message);
         goto error;
     }
 
diff --git a/src/virt-viewer.c b/src/virt-viewer.c
index a3551d4..60ac52d 100644
--- a/src/virt-viewer.c
+++ b/src/virt-viewer.c
@@ -653,7 +653,7 @@ virt_viewer_initial_connect(VirtViewerApp *app, GError **error)
             } else {
                 g_set_error_literal(&err, VIRT_VIEWER_ERROR, VIRT_VIEWER_ERROR_FAILED,
                                     _("Failed to activate viewer"));
-                g_debug(err->message);
+                g_debug("%s", err->message);
                 goto cleanup;
             }
         }