diff --git a/mira/metamodel/utils.py b/mira/metamodel/utils.py
index e77732fb3..86489f44e 100644
--- a/mira/metamodel/utils.py
+++ b/mira/metamodel/utils.py
@@ -43,6 +43,10 @@ def __get_validators__(cls):
     def validate(cls, v):
         if isinstance(v, cls):
             return v
+        elif isinstance(v, float):
+            return cls(sympy.Float(v))
+        elif isinstance(v, int):
+            return cls(sympy.Integer(v))
         return cls(v)
 
     @classmethod
diff --git a/tests/test_metamodel.py b/tests/test_metamodel.py
index 6fd3f46f4..5b86d996a 100644
--- a/tests/test_metamodel.py
+++ b/tests/test_metamodel.py
@@ -249,4 +249,13 @@ def test_safe_parse_nfkc():
 def test_safe_parse_curly_braces():
     var = 'x_{a}'
     var_sym = sympy.Symbol('x_{a}')
-    assert safe_parse_expr(var, local_dict={var: var_sym}) == var_sym
\ No newline at end of file
+    assert safe_parse_expr(var, local_dict={var: var_sym}) == var_sym
+
+
+def test_initial_expression_float():
+    init = Initial(concept=Concept(name='x'), expression=1.0)
+    assert isinstance(init.expression, SympyExprStr)
+    assert isinstance(init.expression.args[0], sympy.Expr)
+    init = Initial(concept=Concept(name='x'), expression=1)
+    assert isinstance(init.expression, SympyExprStr)
+    assert isinstance(init.expression.args[0], sympy.Expr)