diff --git a/openbsc/src/libmgcp/mgcp_transcode.c b/openbsc/src/libmgcp/mgcp_transcode.c
index 581cd32..b76c5d9 100644
--- a/openbsc/src/libmgcp/mgcp_transcode.c
+++ b/openbsc/src/libmgcp/mgcp_transcode.c
@@ -154,7 +154,7 @@
 {
 	switch (state->src_fmt) {
 	case AF_GSM:
-		if (state->dst.gsm_handle)
+		if (state->src.gsm_handle)
 			gsm_destroy(state->src.gsm_handle);
 		break;
 #ifdef HAVE_BCG729