diff --git a/library/timing.c b/library/timing.c
index 37a9303..6c14a4f 100644
--- a/library/timing.c
+++ b/library/timing.c
@@ -262,7 +262,7 @@
     Sleep( alarmMs );
     mbedtls_timing_alarmed = 1;
     /* _endthread will be called implicitly on return
-     * That ensures execution of thread funcition's epilogue */
+     * That ensures execution of thread function's epilogue */
 }
 
 void mbedtls_set_alarm( int seconds )