diff --git a/src/debug.h b/src/debug.h
index 4388887..79cc6ec 100644
--- a/src/debug.h
+++ b/src/debug.h
@@ -97,7 +97,7 @@
 #define PROTOCOL_VERSION 18
 
 #ifndef FIRMWARE_VERSION
-	#define FIRMWARE_VERSION "UNKNOWN"
+#define FIRMWARE_VERSION "UNKNOWN"
 #endif
 
 #endif  // SLIMEVR_DEBUG_H_