diff --git a/src/gsm/lapd_core.c b/src/gsm/lapd_core.c
index fd1e709..fd163c8 100644
--- a/src/gsm/lapd_core.c
+++ b/src/gsm/lapd_core.c
@@ -158,7 +158,7 @@
 {
 	unsigned int i;
 
-	if (!dl->range_hist)
+	if (!dl->range_hist || !dl->tx_hist)
 		return;
 
 	for (i = 0; i < dl->range_hist; i++) {