diff --git a/gfort2py/gfort2py.py b/gfort2py/gfort2py.py
index d8392e4..fc67003 100644
--- a/gfort2py/gfort2py.py
+++ b/gfort2py/gfort2py.py
@@ -68,13 +68,16 @@ def __dir__(self):
         return self.keys()
 
     def __getattr__(self, key):
+        k = key
+        key = key.lower()
+
         if key in self.__dict__:
             return self.__dict__[key]
 
         if "_initialized" in self.__dict__:
             if self._initialized:
                 if key not in self.keys():
-                    raise AttributeError(f"{self._mod_file}  has no attribute {key}")
+                    raise AttributeError(f"{self._mod_file}  has no attribute {k}")
 
             if self._module[key].is_variable():
                 if key not in self._saved:
@@ -98,6 +101,9 @@ def __getattr__(self, key):
                 )
 
     def __setattr__(self, key, value):
+        k = key
+        key = key.lower()
+
         if key in self.__dict__:
             self.__dict__[key] = value
             return
diff --git a/tests/basic.f90 b/tests/basic.f90
index 6e73a5c..fde4f1d 100644
--- a/tests/basic.f90
+++ b/tests/basic.f90
@@ -49,6 +49,10 @@ module basic
 		real              :: a_real_set=7.0
 		real(dp)          :: a_real_dp_set=8.0_dp
 
+		! Test Mixed Case variables
+		integer :: a_int_MIXED
+		integer :: const_int_MIXED = 1
+
 		
 	contains
 
@@ -235,4 +239,10 @@ logical function func_test_bool(x)
 
 		end function func_test_bool
 
+
+		integer function func_TEST_CASE()
+			func_TEST_CASE = 1
+		end function func_TEST_CASE
+
+
 end module basic
diff --git a/tests/basic_test.py b/tests/basic_test.py
index afba4b9..551341a 100644
--- a/tests/basic_test.py
+++ b/tests/basic_test.py
@@ -255,3 +255,21 @@ def test_func_check_mod(self):
         x.a_real_dp = 5.0
 
         assert x.func_check_mod().result
+
+    def test_mixed_case(self):
+
+        assert x.const_int_MIXED == 1
+        assert x.const_int_mixed == 1
+        assert x.CONST_INT_MIXED == 1
+
+        x.a_int_MIXED = 5
+        assert x.a_int_MIXED == 5
+
+        assert x.a_int_mixed == 5
+
+        x.a_int_mixed = 6
+        assert x.A_INT_MIXED == 6
+
+        assert x.func_TEST_CASE().result
+        assert x.func_test_case().result
+        assert x.FUNC_test_case().result