diff --git a/src/kaleidoscope/MatrixAddr.h b/src/kaleidoscope/MatrixAddr.h
index b1a1872b..cd47ab2f 100644
--- a/src/kaleidoscope/MatrixAddr.h
+++ b/src/kaleidoscope/MatrixAddr.h
@@ -66,8 +66,15 @@ class MatrixAddr {
   ThisType &operator=(ThisType &&) = default;
 
   template<typename MatrixAddr__>
+  explicit
   constexpr MatrixAddr(const MatrixAddr__ &other)
-    : MatrixAddr(other.row(), other.col()) {}
+    : MatrixAddr(other.row(), other.col()) 
+  {
+     static_assert(MatrixAddr__::rows <= ThisType::rows,
+        "Matrix type conversion failed. Source type must not have greater row size than target type");
+     static_assert(MatrixAddr__::cols <= ThisType::cols,
+        "Matrix type conversion failed. Source type must not have greater col size than target type");
+  }
 
   constexpr uint8_t row() const {
     return offset_ / cols;