diff --git a/src/TypeDef.h b/src/TypeDef.h
index 73c81802..931426ac 100644
--- a/src/TypeDef.h
+++ b/src/TypeDef.h
@@ -139,7 +139,7 @@
   \brief There was an unexpected, unknown error. If you see this, something went incredibly wrong.
   Your Arduino may be possessed, contact your local exorcist to resolve this error.
 */
-#define ERR_UNKNOWN                            -1
+#define ERR_UNKNOWN                           -1
 
 // SX127x/RFM9x status codes