diff --git a/include/element.h b/include/element.h
index 228f9bb..de7aab6 100644
--- a/include/element.h
+++ b/include/element.h
@@ -77,7 +77,7 @@ class Element {
     std::vector<std::pair<Element *, std::string>> getOutputSpecelPointers();
     bool clearOutputs();
     bool clearOutputPointers();
-    bool clearInputs();
+    void clearInputs();
     std::map<std::string, bool> getInputs();
     bool addOutput(std::string);
     bool addOutputPointer(std::pair<Element *, std::string>);
diff --git a/src/MNRLAdapter.cpp b/src/MNRLAdapter.cpp
index 4ba32c5..f6a367c 100644
--- a/src/MNRLAdapter.cpp
+++ b/src/MNRLAdapter.cpp
@@ -41,6 +41,9 @@ static string convertThreshold(MNRLDefs::CounterMode m) {
             return "latch";
         case MNRLDefs::CounterMode::ROLLOVER_ON_THRESHOLD:
             return "roll";
+        default:
+            cerr << "Unknown counter mode. Exiting." << endl;
+            exit(1);
     }
 }
 
diff --git a/src/element.cpp b/src/element.cpp
index 39f854c..5e2a369 100644
--- a/src/element.cpp
+++ b/src/element.cpp
@@ -306,7 +306,7 @@ bool Element::clearOutputPointers() {
     return true;
 }
 
-bool Element::clearInputs() {
+void Element::clearInputs() {
 
     inputs.clear();
 }