diff --git a/src/urclock.c b/src/urclock.c
index 2dfef552c..fc0fbe53e 100644
--- a/src/urclock.c
+++ b/src/urclock.c
@@ -1566,7 +1566,7 @@ static int ur_initstruct(const PROGRAMMER *pgm, const AVRPART *p) {
     uint64_t urclockID;
     if((rc = readUrclockID(pgm, p, &urclockID)) == -1)
       return rc;
-    term_out("%0*lx", 2*ur.idlen, urclockID), first=0;
+    term_out("%0*llx", 2*ur.idlen, (unsigned long long) urclockID), first=0;
   }
   if(havemetadata) {
     if(ur.showdate || ur.showall) {
diff --git a/src/xbee.c b/src/xbee.c
index f94a80b65..378cfc9d0 100644
--- a/src/xbee.c
+++ b/src/xbee.c
@@ -247,8 +247,8 @@ static void xbeeStatsAdd(struct XBeeStaticticsSummary *summary,
 
 static void xbeeStatsSummarise(struct XBeeStaticticsSummary const *summary)
 {
-  pmsg_notice("  Minimum response time: %lu.%06lu\n", summary->minimum.tv_sec, summary->minimum.tv_usec);
-  pmsg_notice("  Maximum response time: %lu.%06lu\n", summary->maximum.tv_sec, summary->maximum.tv_usec);
+  pmsg_notice("  Minimum response time: %lu.%06lu\n", summary->minimum.tv_sec, (unsigned long) summary->minimum.tv_usec);
+  pmsg_notice("  Maximum response time: %lu.%06lu\n", summary->maximum.tv_sec, (unsigned long) summary->maximum.tv_usec);
 
   struct timeval average;
 
@@ -261,7 +261,7 @@ static void xbeeStatsSummarise(struct XBeeStaticticsSummary const *summary)
   average.tv_sec += usecs / 1000000;
   average.tv_usec = usecs % 1000000;
 
-  pmsg_notice("  Average response time: %lu.%06lu\n", average.tv_sec, average.tv_usec);
+  pmsg_notice("  Average response time: %lu.%06lu\n", average.tv_sec, (unsigned long) average.tv_usec);
 }
 
 static void XBeeBootSessionInit(struct XBeeBootSession *xbs) {