diff --git a/CPP/Clipper2Lib/include/clipper2/clipper.core.h b/CPP/Clipper2Lib/include/clipper2/clipper.core.h
index 40124804..624de903 100644
--- a/CPP/Clipper2Lib/include/clipper2/clipper.core.h
+++ b/CPP/Clipper2Lib/include/clipper2/clipper.core.h
@@ -88,6 +88,9 @@ namespace Clipper2Lib
       throw Clipper2Exception(undefined_error);
     case range_error_i:
       throw Clipper2Exception(range_error);
+    // Should never happen, but adding this to stop a compiler warning
+    default:
+      throw Clipper2Exception("Unknown error");
     }
 #else
     ++error_code; // only to stop compiler warning
diff --git a/CPP/Clipper2Lib/src/clipper.engine.cpp b/CPP/Clipper2Lib/src/clipper.engine.cpp
index d3a146b4..97717322 100644
--- a/CPP/Clipper2Lib/src/clipper.engine.cpp
+++ b/CPP/Clipper2Lib/src/clipper.engine.cpp
@@ -928,6 +928,9 @@ namespace Clipper2Lib {
     case FillRule::Negative:
       if (e.wind_cnt != -1) return false;
       break;
+    // Should never happen, but adding this to stop a compiler warning
+    default:
+      break;
     }
 
     switch (cliptype_)
@@ -978,6 +981,9 @@ namespace Clipper2Lib {
       break;
 
     case ClipType::Xor: return true;  break;
+    // Should never happen, but adding this to stop a compiler warning
+    default:
+      break;
     }
     return false;  // we should never get here
   }