diff --git a/src/qt/qt_glsl_parser.cpp b/src/qt/qt_glsl_parser.cpp
index a39e6d7bc8..2a4c4ddd13 100644
--- a/src/qt/qt_glsl_parser.cpp
+++ b/src/qt/qt_glsl_parser.cpp
@@ -144,7 +144,7 @@ static glslp_t *glsl_parse(const char *f) {
         strcpy(shader->shader_fn, f);
         shader->shader_program = load_file(f);
         if (!shader->shader_program) {
-                QMessageBox::critical((QWidget *) qApp->findChild<QWindow *>(), QObject::tr("GLSL error"), QObject::tr("Could not load shader %s").arg(shader->shader_fn));
+                QMessageBox::critical((QWidget *) qApp->findChild<QWindow *>(), QObject::tr("GLSL error"), QObject::tr("Could not load shader %1").arg(shader->shader_fn));
                 //wx_simple_messagebox("GLSL error", "Could not load shader %s\n", shader->shader_fn);
                 glslp_free(glslp);
                 return 0;