diff --git a/doc/4.3-object-types.md b/doc/4.3-object-types.md
index 70cdf8a17..1e03e9076 100644
--- a/doc/4.3-object-types.md
+++ b/doc/4.3-object-types.md
@@ -582,7 +582,9 @@ Data Categories:
   DbCatRetention       | Retention data
   DbCatStateHistory    | Historical state data
 
-Multiple categories can be combined using the `|` operator.
+Multiple categories can be combined using the `|` operator. In addition to
+the category flags listed above the `DbCatEverything` flag may be used as
+a shortcut for listing all flags.
 
 ### <a id="objecttype-idomysqlconnection"></a> IdoPgSqlConnection
 
@@ -664,7 +666,9 @@ Data Categories:
   DbCatRetention       | Retention data
   DbCatStateHistory    | Historical state data
 
-Multiple categories can be combined using the `|` operator.
+Multiple categories can be combined using the `|` operator. In addition to
+the category flags listed above the `DbCatEverything` flag may be used as
+a shortcut for listing all flags.
 
 ### <a id="objecttype-livestatuslistener"></a> LiveStatusListener
 
diff --git a/itl/constants.conf b/itl/constants.conf
index 289765519..9bea23778 100644
--- a/itl/constants.conf
+++ b/itl/constants.conf
@@ -81,3 +81,4 @@ set DbCatProgramStatus = (1 << 11)
 set DbCatRetention = (1 << 12)
 set DbCatStateHistory = (1 << 13)
 
+set DbCatEverything = (~0)
diff --git a/lib/config/aexpression.cpp b/lib/config/aexpression.cpp
index 87c9fc02a..19f12564f 100644
--- a/lib/config/aexpression.cpp
+++ b/lib/config/aexpression.cpp
@@ -30,7 +30,7 @@ AExpression::AExpression(AOperator op, const AValue& operand1)
 AExpression::AExpression(AOperator op, const AValue& operand1, const AValue& operand2)
 	: m_Operator(op), m_Operand1(operand1), m_Operand2(operand2)
 {
-	ASSERT(op == AEAdd || op == AESubtract || op == AEMultiply || op == AEDivide ||
+	ASSERT(op == AEAdd || op == AENegate || op == AESubtract || op == AEMultiply || op == AEDivide ||
 		op == AEBinaryAnd || op == AEBinaryOr || op == AEShiftLeft || op == AEShiftRight);
 }
 
@@ -44,6 +44,8 @@ Value AExpression::Evaluate(const Object::Ptr& thisRef) const
 	switch (m_Operator) {
 		case AEReturn:
 			return left;
+		case AENegate:
+			return ~(long)left;
 		case AEAdd:
 			if (left.GetType() == ValueString || right.GetType() == ValueString)
 				return (String)left + (String)right;
diff --git a/lib/config/aexpression.h b/lib/config/aexpression.h
index e9382aa2c..46258ab54 100644
--- a/lib/config/aexpression.h
+++ b/lib/config/aexpression.h
@@ -33,6 +33,7 @@ namespace icinga
 enum AOperator
 {
 	AEReturn,
+	AENegate,
 	AEAdd,
 	AESubtract,
 	AEMultiply,
diff --git a/lib/config/config_parser.yy b/lib/config/config_parser.yy
index 7886bcdf3..3d0b25ec1 100644
--- a/lib/config/config_parser.yy
+++ b/lib/config/config_parser.yy
@@ -555,6 +555,10 @@ aexpression: T_STRING
 		$$ = new Value(make_shared<AExpression>(AEReturn, AValue(ATVariable, $1)));
 		free($1);
 	}
+	| '~' aexpression
+	{
+		$$ = new Value(make_shared<AExpression>(AENegate, static_cast<AExpression::Ptr>(*$2)));
+	}
 	| aexpression '+' aexpression
 	{
 		$$ = new Value(make_shared<AExpression>(AEAdd, static_cast<AExpression::Ptr>(*$1), static_cast<AExpression::Ptr>(*$3)));