diff --git a/miltermodule.c b/miltermodule.c
index 76ab4ee64d56f05b095cac12057ac533b46ea76d..947dc8d2849c0ef63687312080b954125c89e9fd 100644
--- a/miltermodule.c
+++ b/miltermodule.c
@@ -1145,7 +1145,7 @@ Change/delete a header in the message. \n\
 It is not checked for standards compliance; the mail filter\n\
 must ensure that no protocols are violated as a result of adding this header.\n\
 field - header field name\n\
-int - the Nth occurence of this header\n\
+int - the Nth occurrence of this header\n\
 value - header field value\n\
 field and value are strings.\n\
 This function can only be called from the EOM callback.";