diff --git a/src/include/libpq/hba.h b/src/include/libpq/hba.h
index ecdbd0114ec..a7e6a80c262 100644
--- a/src/include/libpq/hba.h
+++ b/src/include/libpq/hba.h
@@ -125,7 +125,7 @@ extern bool load_ident(void);
 extern void hba_getauthmethod(hbaPort *port);
 extern int check_usermap(const char *usermap_name,
 			  const char *pg_role, const char *auth_user,
-			  bool case_sensitive);
+			  bool case_insensitive);
 extern bool pg_isblank(const char c);
 
 #endif							/* HBA_H */