diff --git a/system/uorb/sensor/ppgd.c b/system/uorb/sensor/ppgd.c
index abac23e60..574f8928b 100644
--- a/system/uorb/sensor/ppgd.c
+++ b/system/uorb/sensor/ppgd.c
@@ -31,7 +31,7 @@
 #ifdef CONFIG_DEBUG_UORB
 static const char sensor_ppgd_format[] =
   "timestamp:%" PRIu64 ",ppg0:%" PRIu32 ",ppg1:%" PRIu32 ","
-  "current:%" PRIu32 ",gain0:%" PRIu16 ",gain1:%" PRIu16 "";
+  "current:%" PRIu32 ",gain0:%hu,gain1:%hu";
 #endif
 
 /****************************************************************************
diff --git a/system/uorb/sensor/ppgq.c b/system/uorb/sensor/ppgq.c
index 89e6e592c..108710533 100644
--- a/system/uorb/sensor/ppgq.c
+++ b/system/uorb/sensor/ppgq.c
@@ -31,8 +31,8 @@
 #ifdef CONFIG_DEBUG_UORB
 static const char sensor_ppgq_format[] =
   "timestamp:%" PRIu64 ",ppg0:%" PRIu32 ",ppg1:%" PRIu32 ",ppg2:%" PRIu32 ","
-  "ppg3:%" PRIu32 ",current:%" PRIu32 ",gain0:%" PRIu16 ",gain1:%" PRIu16 ","
-  "gain2:%" PRIu16 ",gain3:%" PRIu16 "";
+  "ppg3:%" PRIu32 ",current:%" PRIu32 ",gain0:%hu,gain1:%hu,gain2:%hu,"
+  "gain3:%hu";
 #endif
 
 /****************************************************************************