diff --git a/libraries/AP_ADC/AP_ADC_ADS7844.cpp b/libraries/AP_ADC/AP_ADC_ADS7844.cpp
index 4c53abf19c..39f4dec9b8 100644
--- a/libraries/AP_ADC/AP_ADC_ADS7844.cpp
+++ b/libraries/AP_ADC/AP_ADC_ADS7844.cpp
@@ -163,7 +163,7 @@ void AP_ADC_ADS7844::Init()
     _ch6_last_sample_time_micros = hal.scheduler->micros();
 
     hal.scheduler->resume_timer_procs();
-    hal.scheduler->register_timer_process( AP_ADC_ADS7844::read, 1, 0);
+    hal.scheduler->register_timer_process( AP_ADC_ADS7844::read );
 
 }
 
diff --git a/libraries/AP_Baro/AP_Baro_MS5611.cpp b/libraries/AP_Baro/AP_Baro_MS5611.cpp
index c881009245..be66aaf902 100644
--- a/libraries/AP_Baro/AP_Baro_MS5611.cpp
+++ b/libraries/AP_Baro/AP_Baro_MS5611.cpp
@@ -144,7 +144,7 @@ bool AP_Baro_MS5611::init()
     _d1_count = 0;
     _d2_count = 0;
 
-    hal.scheduler->register_timer_process( AP_Baro_MS5611::_update, 1, 0);
+    hal.scheduler->register_timer_process( AP_Baro_MS5611::_update );
     hal.scheduler->resume_timer_procs();
 
     // wait for at least one value to be read