diff --git a/src/libcharon/encoding/generator.c b/src/libcharon/encoding/generator.c
index aaa7f723fc..3da5f72164 100644
--- a/src/libcharon/encoding/generator.c
+++ b/src/libcharon/encoding/generator.c
@@ -466,8 +466,16 @@ METHOD(generator_t, generate_payload, void,
 	{
 		if (this->debug)
 		{
-			DBG2(DBG_ENC, "  generating rule %d %N",
-				 i, encoding_type_names, rules[i].type);
+			if (rules[i].type < PAYLOAD_LIST)
+			{
+				DBG2(DBG_ENC, "  generating rule %d %N",
+					 i, encoding_type_names, rules[i].type);
+			}
+			else
+			{
+				DBG2(DBG_ENC, "  generating rule %d LIST of %N",
+					 i, payload_type_names, rules[i].type - PAYLOAD_LIST);
+			}
 		}
 		switch ((int)rules[i].type)
 		{