diff --git a/glm/gtx/spaceship.hpp b/glm/gtx/spaceship.hpp
index eb0b50d9..f7ad4b1e 100644
--- a/glm/gtx/spaceship.hpp
+++ b/glm/gtx/spaceship.hpp
@@ -11,6 +11,9 @@ namespace glm
     template<length_t L, typename T, qualifier Q>
     struct vec;
 
+    template<length_t C, length_t R, typename T, qualifier Q>
+    struct mat;
+
     template<length_t L, typename T, qualifier Q>
     GLM_FUNC_DECL GLM_CONSTEXPR std::strong_ordering operator<=>(const vec<L, T, Q>& left, const vec<L, T, Q>& right)
     {
@@ -34,4 +37,19 @@ namespace glm
         }
         return std::strong_ordering::equal;
     }
+
+    template<length_t C, length_t R, typename T, qualifier Q>
+    GLM_FUNC_DECL GLM_CONSTEXPR std::strong_ordering operator<=>(const mat<C, R, T, Q>& left, const mat<C, R, T, Q>& right)
+    {
+        for (int col = 0; col < C; ++col)
+        {
+            for (int row = 0; row < R; ++row)
+            {
+                if (left[col][row] != right[col][row]) {
+                    return left[col][row] <=> right[col][row];
+                }
+            }
+        }
+        return std::strong_ordering::equal;
+    }
 }
\ No newline at end of file