diff --git a/src/main.cc b/src/main.cc
index c8e7618..87c6427 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -119,7 +119,7 @@ int init(App &app) {
          glGetString(GL_SHADING_LANGUAGE_VERSION)
   );
 
-	app.offset_modifier = 0.02f;
+  app.offset_modifier = 0.02f;
 
   return EXIT_CODE_SUCCESS;
 }
@@ -234,7 +234,9 @@ void run_main_loop(App &app) {
     glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
 
     glUseProgram(app.shader_program);
-    glUniform1f(app.u_offset_idx, app.offset);
+    if (app.u_offset_idx >= 0) {
+      glUniform1f(app.u_offset_idx, app.offset);
+    }
     // End pre draw setup
 
     // Draw call