diff --git a/src/tbf.cpp b/src/tbf.cpp
index b810a2d..53117bf 100644
--- a/src/tbf.cpp
+++ b/src/tbf.cpp
@@ -1010,7 +1010,7 @@
 	talloc_free(mac_control_block);
 
 	/* now we must set this flag, so we are allowed to assign downlink
-	 * TBF on PACCH. it is only allowed when TLLI is aknowledged. */
+	 * TBF on PACCH. it is only allowed when TLLI is acknowledged. */
 	dir.ul.contention_resolution_done = 1;
 
 	if (final) {