diff --git a/src/libstrongswan/enum.c b/src/libstrongswan/enum.c
index 258a5b410..5c811bd17 100644
--- a/src/libstrongswan/enum.c
+++ b/src/libstrongswan/enum.c
@@ -43,7 +43,7 @@ int enum_from_name(enum_name_t *e, char *name)
 {
 	do
 	{
-		int i, count = e->last - e->first;
+		int i, count = e->last - e->first + 1;
 
 		for (i = 0; i < count; i++)
 		{