diff --git a/defm.hpp b/defm.hpp
index 4cccfe3c7..8b68749ee 100644
--- a/defm.hpp
+++ b/defm.hpp
@@ -1303,6 +1303,8 @@ class DEFM : public DEFMModel {
 
     std::vector< bool > is_motif();
 
+    bool get_column_major() const noexcept;
+
 };
 
 #endif
@@ -1438,7 +1440,7 @@ inline DEFM::DEFM(
     size_t m_order,
     bool copy_data,
     bool column_major
-) {
+) : column_major(column_major) {
 
     // Pointers
     if (copy_data)
@@ -1772,6 +1774,11 @@ inline std::vector< bool > DEFM::is_motif()
     return res;
 }
 
+inline bool DEFM::get_column_major() const noexcept
+{
+    return column_major;
+}
+
 #undef DEFM_RANGES
 #undef DEFM_LOOP_ARRAYS
 
diff --git a/include/barry/models/defm/defm-bones.hpp b/include/barry/models/defm/defm-bones.hpp
index 27197d60e..5fb8b98a5 100644
--- a/include/barry/models/defm/defm-bones.hpp
+++ b/include/barry/models/defm/defm-bones.hpp
@@ -87,6 +87,8 @@ class DEFM : public DEFMModel {
 
     std::vector< bool > is_motif();
 
+    bool get_column_major() const noexcept;
+
 };
 
 #endif
diff --git a/include/barry/models/defm/defm-meat.hpp b/include/barry/models/defm/defm-meat.hpp
index ba7635e2e..0a5c7549a 100644
--- a/include/barry/models/defm/defm-meat.hpp
+++ b/include/barry/models/defm/defm-meat.hpp
@@ -111,7 +111,7 @@ inline DEFM::DEFM(
     size_t m_order,
     bool copy_data,
     bool column_major
-) {
+) : column_major(column_major) {
 
     // Pointers
     if (copy_data)
@@ -445,6 +445,11 @@ inline std::vector< bool > DEFM::is_motif()
     return res;
 }
 
+inline bool DEFM::get_column_major() const noexcept
+{
+    return column_major;
+}
+
 #undef DEFM_RANGES
 #undef DEFM_LOOP_ARRAYS