diff --git a/docs/types.rst b/docs/types.rst
index 1673c30d0..7f4570edd 100644
--- a/docs/types.rst
+++ b/docs/types.rst
@@ -291,7 +291,7 @@ be passed via and returned from external function calls.
 
 Function types are notated as follows:
 
-    function (<parameter types>) {internal|external} [constant] [returns (<return types>)]
+    function (<parameter types>) {internal|external} [constant] [payable] [returns (<return types>)]
 
 In contrast to the parameter types, the return types cannot be empty - if the
 function type should not return anything, the whole ``returns (<return types>)``
@@ -300,8 +300,13 @@ part has to be omitted.
 By default, function types are internal, so the ``internal`` keyword can be
 omitted.
 
+There are two ways to access a function in the current contract: Either directly
+by its name, ``f``, or using ``this.f``. The former will result in an internal
+function, the latter in an external function.
+
 If a function type variable is not initialized, calling it will result
-in an exception.
+in an exception. The same happens if you call a function after using ``delete``
+on it.
 
 If external function types are used outside of the context of Solidity,
 they are converted into the ``bytes24`` type.
diff --git a/libsolidity/grammar.txt b/libsolidity/grammar.txt
index cfa779eca..c8bc3aed0 100644
--- a/libsolidity/grammar.txt
+++ b/libsolidity/grammar.txt
@@ -22,7 +22,7 @@ StructDefinition = 'struct' Identifier '{'
                      ( VariableDeclaration ';' (VariableDeclaration ';')* )? '}'
 ModifierDefinition = 'modifier' Identifier ParameterList? Block
 FunctionDefinition = 'function' Identifier? ParameterList
-                     ( FunctionCall | Identifier | 'constant' | 'external' | 'public' | 'internal' | 'private' )*
+                     ( FunctionCall | Identifier | 'constant' |' payable' | 'external' | 'public' | 'internal' | 'private' )*
                      ( 'returns' ParameterList )? Block
 EventDefinition = 'event' Identifier IndexedParameterList 'anonymous'? ';'
 
@@ -39,7 +39,7 @@ VariableDeclaration = TypeName Identifier
 TypeName = ElementaryTypeName | Identifier StorageLocation? | Mapping | ArrayTypeName | FunctionTypeName
 Mapping = 'mapping' '(' ElementaryTypeName '=>' TypeName ')'
 ArrayTypeName = TypeName StorageLocation? '[' Expression? ']'
-FunctionTypeName = 'function' TypeNameList ( 'internal' | 'external' | 'constant' )*
+FunctionTypeName = 'function' TypeNameList ( 'internal' | 'external' | 'constant' | 'payable' )*
                    ( 'returns' TypeNameList )?
 StorageLocation = 'memory' | 'storage'