diff --git a/libraries/AP_Generator/AP_Generator_IE_2400.cpp b/libraries/AP_Generator/AP_Generator_IE_2400.cpp
index 01119f759c..344d86d349 100644
--- a/libraries/AP_Generator/AP_Generator_IE_2400.cpp
+++ b/libraries/AP_Generator/AP_Generator_IE_2400.cpp
@@ -77,12 +77,12 @@ void AP_Generator_IE_2400::decode_latest_term()
     switch (_term_number) {
         case 1:
             // Float
-            _parsed.tank_bar = atof(_term);
+            _parsed.tank_bar = strtof(_term, NULL);
             break;
 
         case 2:
             // Float
-            _parsed.battery_volt = atof(_term);
+            _parsed.battery_volt = strtof(_term, NULL);
             break;
 
         case 3:
diff --git a/libraries/AP_Generator/AP_Generator_IE_650_800.cpp b/libraries/AP_Generator/AP_Generator_IE_650_800.cpp
index b9319a2c6e..cee3511309 100644
--- a/libraries/AP_Generator/AP_Generator_IE_650_800.cpp
+++ b/libraries/AP_Generator/AP_Generator_IE_650_800.cpp
@@ -61,7 +61,7 @@ void AP_Generator_IE_650_800::decode_latest_term()
 
     switch (_term_number) {
         case 1:
-            _parsed.tank_pct = atof(_term);
+            _parsed.tank_pct = strtof(_term, NULL);
             // Out of range values
             if (_parsed.tank_pct > 100.0f || _parsed.tank_pct < 0.0f) {
                 _data_valid = false;
@@ -69,7 +69,7 @@ void AP_Generator_IE_650_800::decode_latest_term()
             break;
 
         case 2:
-            _parsed.battery_pct = atof(_term);
+            _parsed.battery_pct = strtof(_term, NULL);
             // Out of range values
             if (_parsed.battery_pct > 100.0f || _parsed.battery_pct < 0.0f) {
                 _data_valid = false;