diff --git a/src/cosimulation.c b/src/cosimulation.c
index a43c66d3..689851a4 100644
--- a/src/cosimulation.c
+++ b/src/cosimulation.c
@@ -104,7 +104,13 @@ ModelInstance *createModelInstance(
 }
 
 void freeModelInstance(ModelInstance *comp) {
-    free((void *)comp->instanceName);
+
+    if (!comp) return;
+
+    if (comp->instanceName) free((void*)comp->instanceName);
+
+    if (comp->resourceLocation) free((void*)comp->resourceLocation);
+
     free(comp);
 }
 
diff --git a/src/fmi1Functions.c b/src/fmi1Functions.c
index e5ce6631..3f7d8006 100644
--- a/src/fmi1Functions.c
+++ b/src/fmi1Functions.c
@@ -243,8 +243,7 @@ fmiStatus fmiResetSlave(fmiComponent c) {
 }
 
 void fmiFreeSlaveInstance(fmiComponent c) {
-    ModelInstance *instance = (ModelInstance *)c;
-    freeModelInstance(instance);
+    freeModelInstance((ModelInstance*)c);
 }
 
 fmiStatus fmiSetRealInputDerivatives(fmiComponent c, const fmiValueReference vr[], size_t nvr,
@@ -588,8 +587,7 @@ fmiStatus fmiTerminate(fmiComponent c){
 }
 
 void fmiFreeModelInstance(fmiComponent c) {
-    ModelInstance *instance = (ModelInstance *)c;
-    freeModelInstance(instance);
+    freeModelInstance((ModelInstance*)c);
 }
 
 #endif // Model Exchange 1.0
diff --git a/src/fmi2Functions.c b/src/fmi2Functions.c
index 92cddc66..98c4a5f6 100644
--- a/src/fmi2Functions.c
+++ b/src/fmi2Functions.c
@@ -299,10 +299,7 @@ fmi2Status fmi2Reset(fmi2Component c) {
 }
 
 void fmi2FreeInstance(fmi2Component c) {
-
-    if (S) {
-        freeModelInstance(S);
-    }
+    freeModelInstance((ModelInstance*)S);
 }
 
 // ---------------------------------------------------------------------------
diff --git a/src/fmi3Functions.c b/src/fmi3Functions.c
index a26ed4d1..364bd49c 100644
--- a/src/fmi3Functions.c
+++ b/src/fmi3Functions.c
@@ -374,11 +374,7 @@ fmi3Instance fmi3InstantiateScheduledExecution(
 #endif
 }
 
-
 void fmi3FreeInstance(fmi3Instance instance) {
-
-    if (!instance) return;
-
     freeModelInstance((ModelInstance*)instance);
 }