diff --git a/sonoff/sonoff_post.h b/sonoff/sonoff_post.h
index c25b961c3..aea346dba 100644
--- a/sonoff/sonoff_post.h
+++ b/sonoff/sonoff_post.h
@@ -268,7 +268,7 @@ char* ToHex_P(const unsigned char * in, size_t insz, char * out, size_t outsz, c
 #undef USE_RF_SENSOR                          // Disable support for RF sensor receiver (434MHz or 868MHz) (+0k8 code)
 #undef USE_SM16716                            // Disable support for SM16716 RGB LED controller (+0k7 code)
 #undef USE_HRE                                // Disable support for Badger HR-E Water Meter (+1k4 code)
-#undef USE_A4988_Stepper                      // Disable support for A4988_Stepper
+#undef USE_A4988_STEPPER                      // Disable support for A4988_Stepper
 #undef DEBUG_THEO                             // Disable debug code
 #undef USE_DEBUG_DRIVER                       // Disable debug code
 #endif  // FIRMWARE_CLASSIC