diff --git a/src/osmo-bts-litecell15/lc15_l1_if.c b/src/osmo-bts-litecell15/lc15_l1_if.c
index 99c82a1..13e0fc9 100644
--- a/src/osmo-bts-litecell15/lc15_l1_if.c
+++ b/src/osmo-bts-litecell15/lc15_l1_if.c
@@ -217,7 +217,7 @@
 	case GsmL1_Sapi_Pacch:
 		/* PDTCH / PACCH frame handling */
 		if (data_ind->msgUnitParam.u8Size != 0 &&
-		    data_ind->msgUnitParam.u8Buffer[0] != GsmL1_PdtchPlType_Full) {
+		    data_ind->msgUnitParam.u8Buffer[0] == GsmL1_PdtchPlType_Full) {
 			data = data_ind->msgUnitParam.u8Buffer + 1;
 			data_len = data_ind->msgUnitParam.u8Size - 1;
 			if (data_len == 0)