diff --git a/include/ac_set_ovl_gyoei.h b/include/ac_set_ovl_gyoei.h
index 020a2eb7..b76059a2 100644
--- a/include/ac_set_ovl_gyoei.h
+++ b/include/ac_set_ovl_gyoei.h
@@ -87,7 +87,7 @@ enum fish_type {
 /* number of terms in a given month */
 enum fish_term {
   aSOG_TERM_0,
-  aSOG_TERM1,
+  aSOG_TERM_1,
 
   aSOG_TERM_NUM
 };