diff --git a/phply/phpast.py b/phply/phpast.py
index aa0b2ed..08764e4 100644
--- a/phply/phpast.py
+++ b/phply/phpast.py
@@ -123,3 +123,5 @@ def node(name, fields):
 Namespace = node('Namespace', ['name', 'nodes'])
 UseDeclarations = node('UseDeclarations', ['nodes'])
 UseDeclaration = node('UseDeclaration', ['name', 'alias'])
+ConstantDeclarations = node('ConstantDeclarations', ['nodes'])
+ConstantDeclaration = node('ConstantDeclaration', ['name', 'initial'])
diff --git a/phply/phpparse.py b/phply/phpparse.py
index cb0e75e..4ad9782 100644
--- a/phply/phpparse.py
+++ b/phply/phpparse.py
@@ -76,6 +76,10 @@ def p_top_statement_namespace(p):
     else:
         p[0] = ast.Namespace(p[2], p[4], lineno=p.lineno(1))
 
+def p_top_statement_constant(p):
+    'top_statement : CONST constant_declarations SEMI'
+    p[0] = ast.ConstantDeclarations(p[2], lineno=p.lineno(1))
+
 def p_top_statement_use(p):
     'top_statement : USE use_declarations SEMI'
     p[0] = ast.UseDeclarations(p[2], lineno=p.lineno(1))
@@ -102,6 +106,18 @@ def p_use_declaration(p):
     else:
         p[0] = ast.UseDeclaration(p[1] + p[2], p[4], lineno=p.lineno(1))
 
+def p_constant_declarations(p):
+    '''constant_declarations : constant_declarations COMMA constant_declaration
+                             | constant_declaration'''
+    if len(p) == 4:
+        p[0] = p[1] + [p[3]]
+    else:
+        p[0] = [p[1]]
+
+def p_constant_declaration(p):
+    'constant_declaration : STRING EQUALS static_scalar'
+    p[0] = ast.ConstantDeclaration(p[1], p[3], lineno=p.lineno(1))
+
 def p_inner_statement_list(p):
     '''inner_statement_list : inner_statement_list inner_statement
                             | empty'''
diff --git a/tests/test_parser.py b/tests/test_parser.py
index f244d3b..6dea6b0 100644
--- a/tests/test_parser.py
+++ b/tests/test_parser.py
@@ -554,3 +554,15 @@ def test_use_declarations():
                          UseDeclaration('\\c\\d\\e', 'f')]),
     ]
     eq_ast(input, expected)
+
+def test_constant_declarations():
+    input = r"""<?
+        const foo = 42;
+        const bar = 'baz', wat = DOO;
+    ?>"""
+    expected = [
+        ConstantDeclarations([ConstantDeclaration('foo', 42)]),
+        ConstantDeclarations([ConstantDeclaration('bar', 'baz'),
+                              ConstantDeclaration('wat', Constant('DOO'))]),
+    ]
+    eq_ast(input, expected)