diff --git a/sys/netatm/uni/sscf_uni.c b/sys/netatm/uni/sscf_uni.c
index de9c32af844d..8ca343b257e3 100644
--- a/sys/netatm/uni/sscf_uni.c
+++ b/sys/netatm/uni/sscf_uni.c
@@ -290,7 +290,7 @@ sscf_uni_abort(uvp, msg)
 	/*
 	 * Log error message
 	 */
-	log(LOG_ERR, msg);
+	log(LOG_ERR, "%s", msg);
 
 	/*
 	 * Set termination states
diff --git a/sys/netatm/uni/sscop.c b/sys/netatm/uni/sscop.c
index 9381077d51b1..3c893f1189fa 100644
--- a/sys/netatm/uni/sscop.c
+++ b/sys/netatm/uni/sscop.c
@@ -399,7 +399,7 @@ sscop_abort(sop, msg)
 	/*
 	 * Log and count error
 	 */
-	log(LOG_ERR, msg);
+	log(LOG_ERR, "%s", msg);
 	sscop_stat.sos_aborts++;
 
 	/*