diff --git a/src/platform/gl.nim b/src/platform/gl.nim
index 8de3247..3e48ab9 100644
--- a/src/platform/gl.nim
+++ b/src/platform/gl.nim
@@ -20,10 +20,12 @@ proc get_program_info_log*(program: GLuint): string =
     glGetProgramInfoLog(program, logSize.GLsizei, nil, s.cstring)
     return s
 
-let main_thread_id = getThreadID()
+when compileOption("threads"):
+    let main_thread_id = getThreadID()
 
 template handleError(x: untyped, t: string) =
-    assert main_thread_id == getThreadID()
+    when compileOption("threads"):
+        assert main_thread_id == getThreadID()
     try:
         x
     except: