diff --git a/tailbone/grids/core.py b/tailbone/grids/core.py
index 044d2302..676480b6 100644
--- a/tailbone/grids/core.py
+++ b/tailbone/grids/core.py
@@ -416,7 +416,7 @@ class Grid(object):
             elif isinstance(column.type, sa.Numeric):
                 factory = gridfilters.AlchemyNumericFilter
             elif isinstance(column.type, sa.Integer):
-                factory = gridfilters.AlchemyNumericFilter
+                factory = gridfilters.AlchemyIntegerFilter
             elif isinstance(column.type, sa.Boolean):
                 # TODO: check column for nullable here?
                 factory = gridfilters.AlchemyNullableBooleanFilter
diff --git a/tailbone/grids/filters.py b/tailbone/grids/filters.py
index a3431ef6..7d355300 100644
--- a/tailbone/grids/filters.py
+++ b/tailbone/grids/filters.py
@@ -460,6 +460,18 @@ class AlchemyNumericFilter(AlchemyGridFilter):
         return super(AlchemyNumericFilter, self).filter_less_equal(query, value)
 
 
+class AlchemyIntegerFilter(AlchemyNumericFilter):
+    """
+    Integer filter for SQLAlchemy.
+    """
+
+    def value_invalid(self, value):
+        if value:
+            if not value.isdigit():
+                return True
+        return False
+
+
 class AlchemyBooleanFilter(AlchemyGridFilter):
     """
     Boolean filter for SQLAlchemy.