diff --git a/CHANGELOG.md b/CHANGELOG.md
index 44c98cb5..8b2c84ad 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -47,6 +47,7 @@ will consitute of a breaking change warranting a new major release:
   maximum size of 255 bytes.
 - TCS CTRL: Limit number of heater handler messages sent in case there are not sensors available
   anymore.
+- Fix to allow adding real STR device for EM.
 
 # Added
 
diff --git a/bsp_q7s/em/emObjectFactory.cpp b/bsp_q7s/em/emObjectFactory.cpp
index a7b05e3d..e5d6abc2 100644
--- a/bsp_q7s/em/emObjectFactory.cpp
+++ b/bsp_q7s/em/emObjectFactory.cpp
@@ -82,6 +82,9 @@ void ObjectFactory::produce(void* args) {
   // The ACU broke.
   dummyCfg.addOnlyAcuDummy = true;
 #endif
+#if OBSW_ADD_STAR_TRACKER == 1
+  dummyCfg.addStrDummy = false;
+#endif
 #if OBSW_ADD_BPX_BATTERY_HANDLER == 1
   dummyCfg.addBpxBattDummy = false;
 #endif
diff --git a/bsp_q7s/objectFactory.cpp b/bsp_q7s/objectFactory.cpp
index e6ae6603..326ba8ef 100644
--- a/bsp_q7s/objectFactory.cpp
+++ b/bsp_q7s/objectFactory.cpp
@@ -937,16 +937,7 @@ void ObjectFactory::createStrComponents(PowerSwitchIF* pwrSwitcher) {
   starTrackerCookie->setNoFixedSizeReply();
   StrComHandler* strComIF = new StrComHandler(objects::STR_COM_IF);
 
-  const char* paramJsonFile = nullptr;
-#ifdef EGSE
-  paramJsonFile = "/home/pi/arcsec/json/flight-config.json";
-#else
-#if OBSW_STAR_TRACKER_GROUND_CONFIG == 1
-  paramJsonFile = "/mnt/sd0/startracker/ground-config.json";
-#else
-  paramJsonFile = "/mnt/sd0/startracker/flight-config.json";
-#endif
-#endif
+  const char* paramJsonFile = "/mnt/sd0/startracker/flight-config.json";
   if (paramJsonFile == nullptr) {
     sif::error << "No valid Star Tracker parameter JSON file" << std::endl;
   }
diff --git a/dummies/helperFactory.cpp b/dummies/helperFactory.cpp
index 84d6acc9..e085dae0 100644
--- a/dummies/helperFactory.cpp
+++ b/dummies/helperFactory.cpp
@@ -63,11 +63,14 @@ void dummy::createDummies(DummyCfg cfg, PowerSwitchIF& pwrSwitcher, GpioIF* gpio
   rws[3] = new RwDummy(objects::RW4, objects::DUMMY_COM_IF, comCookieDummy);
   ObjectFactory::createRwAssy(pwrSwitcher, power::Switches::PDU2_CH2_RW_5V, rws, rwIds);
   new SaDeplDummy(objects::SOLAR_ARRAY_DEPL_HANDLER);
-  auto* strAssy = new StrAssembly(objects::STR_ASSY);
-  strAssy->connectModeTreeParent(satsystem::acs::ACS_SUBSYSTEM);
-  auto* strDummy =
-      new StarTrackerDummy(objects::STAR_TRACKER, objects::DUMMY_COM_IF, comCookieDummy);
-  strDummy->connectModeTreeParent(*strAssy);
+
+  if (cfg.addStrDummy) {
+    auto* strAssy = new StrAssembly(objects::STR_ASSY);
+    strAssy->connectModeTreeParent(satsystem::acs::ACS_SUBSYSTEM);
+    auto* strDummy =
+        new StarTrackerDummy(objects::STAR_TRACKER, objects::DUMMY_COM_IF, comCookieDummy);
+    strDummy->connectModeTreeParent(*strAssy);
+  }
   if (cfg.addSyrlinksDummies) {
     auto* syrlinksDummy =
         new SyrlinksDummy(objects::SYRLINKS_HANDLER, objects::DUMMY_COM_IF, comCookieDummy);
diff --git a/dummies/helperFactory.h b/dummies/helperFactory.h
index 9c1a93d3..fb272bb8 100644
--- a/dummies/helperFactory.h
+++ b/dummies/helperFactory.h
@@ -27,6 +27,7 @@ struct DummyCfg {
   bool addTempSensorDummies = true;
   bool addRtdComIFDummy = true;
   bool addPlocDummies = true;
+  bool addStrDummy = true;
   bool addTmpDummies = true;
   Tmp1075Cfg tmp1075Cfg;
   bool addCamSwitcherDummy = false;