diff --git a/src/main/main.c b/src/main/main.c
index ce6bd7893e..73175023e4 100644
--- a/src/main/main.c
+++ b/src/main/main.c
@@ -48,8 +48,8 @@ void FAST_CODE run(void)
 {
     while (true) {
         scheduler();
-#if RUN_LOOP_DELAY_US
-        delayMicroseconds_real(RUN_LOOP_DELAY_US); // max rate 20kHz
+#if defined(RUN_LOOP_DELAY_US) && RUN_LOOP_DELAY_US > 0
+        delayMicroseconds_real(RUN_LOOP_DELAY_US);
 #endif
     }
 }