diff --git a/internal/uidriver/glfw/ui_unix.go b/internal/uidriver/glfw/ui_unix.go
index 69d473dce..8abf1a7e9 100644
--- a/internal/uidriver/glfw/ui_unix.go
+++ b/internal/uidriver/glfw/ui_unix.go
@@ -19,6 +19,7 @@
 package glfw
 
 import (
+	"fmt"
 	"math"
 	"runtime"