diff --git a/hyperon_das_atomdb_cpp/src/utils/expression_hasher.h b/hyperon_das_atomdb_cpp/src/utils/expression_hasher.h
index 169ee68..3aa713c 100644
--- a/hyperon_das_atomdb_cpp/src/utils/expression_hasher.h
+++ b/hyperon_das_atomdb_cpp/src/utils/expression_hasher.h
@@ -25,8 +25,10 @@
 
 #include <mbedtls/md5.h>
 
-#include <string>
 #include <stdexcept>
+#include <string>
+
+#include "type_aliases.h"
 
 using namespace std;
 
diff --git a/hyperon_das_atomdb_cpp/src/utils/patterns.h b/hyperon_das_atomdb_cpp/src/utils/patterns.h
index 29d53bb..cb79995 100644
--- a/hyperon_das_atomdb_cpp/src/utils/patterns.h
+++ b/hyperon_das_atomdb_cpp/src/utils/patterns.h
@@ -29,12 +29,12 @@ using StringMatrix = vector<vector<string>>;
 
 /**
  * @brief A cache for binary matrices indexed by integers.
- * 
- * This unordered map stores precomputed binary matrices (IntMatrix) 
- * associated with integer keys. It is used to optimize performance 
+ *
+ * This unordered map stores precomputed binary matrices (IntMatrix)
+ * associated with integer keys. It is used to optimize performance
  * by avoiding redundant calculations of the same binary matrix.
- * 
- * @note The cache is initialized with a default entry where the key is 0 
+ *
+ * @note The cache is initialized with a default entry where the key is 0
  * and the value is an empty IntMatrix.
  */
 unordered_map<int, IntMatrix> BINARY_MATRIX_CACHE = {{0, {{}}}};