diff --git a/libraries/AP_HAL/SIMState.cpp b/libraries/AP_HAL/SIMState.cpp
index edddcd7c983dc..ba562362105bc 100644
--- a/libraries/AP_HAL/SIMState.cpp
+++ b/libraries/AP_HAL/SIMState.cpp
@@ -232,8 +232,8 @@ void SIMState::fdm_input_local(void)
         vectornav->update();
     }
 
-    if (microstrain != nullptr) {
-        microstrain->update();
+    if (microstrain5 != nullptr) {
+        microstrain5->update();
     }
 
 #if HAL_SIM_AIS_ENABLED