diff --git a/docs/control-structures.rst b/docs/control-structures.rst
index df8ac729c5be..019714f8edf6 100644
--- a/docs/control-structures.rst
+++ b/docs/control-structures.rst
@@ -398,10 +398,9 @@ Currently, Solidity automatically generates a runtime exception in the following
 
 While a user-provided exception is generated in the following situations:
 #. Calling ``throw``.
-#. The condition of ``assert(condition)`` is not met.
 
 Internally, Solidity performs a revert operation (instruction ``0xfd``) when a user-provided exception is thrown. In contrast, it performs an invalid operation
 (instruction ``0xfe``) if a runtime exception is encountered. In both cases, this causes
 the EVM to revert all changes made to the state. The reason for this is that there is no safe way to continue execution, because an expected effect
 did not occur. Because we want to retain the atomicity of transactions, the safest thing to do is to revert all changes and make the whole transaction
-(or at least call) without effect.
\ No newline at end of file
+(or at least call) without effect.
diff --git a/docs/miscellaneous.rst b/docs/miscellaneous.rst
index 3c57507efe4d..6e272eaa91c8 100644
--- a/docs/miscellaneous.rst
+++ b/docs/miscellaneous.rst
@@ -435,7 +435,7 @@ The following is the order of precedence for operators, listed in order of evalu
 | *16*       | Comma operator                      | ``,``                                      |
 +------------+-------------------------------------+--------------------------------------------+
 
-.. index:: block, coinbase, difficulty, number, block;number, timestamp, block;timestamp, msg, data, gas, sender, value, now, gas price, origin, assert, revert, keccak256, ripemd160, sha256, ecrecover, addmod, mulmod, cryptography, this, super, selfdestruct, balance, send
+.. index:: block, coinbase, difficulty, number, block;number, timestamp, block;timestamp, msg, data, gas, sender, value, now, gas price, origin, revert, keccak256, ripemd160, sha256, ecrecover, addmod, mulmod, cryptography, this, super, selfdestruct, balance, send
 
 Global Variables
 ================
@@ -461,7 +461,6 @@ Global Variables
 - ``ecrecover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) returns (address)``: recover address associated with the public key from elliptic curve signature, return zero on error
 - ``addmod(uint x, uint y, uint k) returns (uint)``: compute ``(x + y) % k`` where the addition is performed with arbitrary precision and does not wrap around at ``2**256``
 - ``mulmod(uint x, uint y, uint k) returns (uint)``: compute ``(x * y) % k`` where the multiplication is performed with arbitrary precision and does not wrap around at ``2**256``
-- ``assert(bool condition)``: throws if the condition is false
 - ``this`` (current contract's type): the current contract, explicitly convertible to ``address``
 - ``super``: the contract one level higher in the inheritance hierarchy
 - ``selfdestruct(address recipient)``: destroy the current contract, sending its funds to the given address
diff --git a/libsolidity/analysis/GlobalContext.cpp b/libsolidity/analysis/GlobalContext.cpp
index 4f100cd0ee4a..069d10f5fd4b 100644
--- a/libsolidity/analysis/GlobalContext.cpp
+++ b/libsolidity/analysis/GlobalContext.cpp
@@ -66,8 +66,9 @@ m_magicVariables(vector<shared_ptr<MagicVariableDeclaration const>>{make_shared<
 							make_shared<FunctionType>(strings{"bytes32", "uint8", "bytes32", "bytes32"}, strings{"address"}, FunctionType::Location::ECRecover)),
 					make_shared<MagicVariableDeclaration>("ripemd160",
 							make_shared<FunctionType>(strings(), strings{"bytes20"}, FunctionType::Location::RIPEMD160, true)),
-					make_shared<MagicVariableDeclaration>("assert",
-							make_shared<FunctionType>(strings{"bool"}, strings{}, FunctionType::Location::Assert)),
+// Disabled until decision about semantics of assert is made.
+//					make_shared<MagicVariableDeclaration>("assert",
+//							make_shared<FunctionType>(strings{"bool"}, strings{}, FunctionType::Location::Assert)),
 					make_shared<MagicVariableDeclaration>("revert",
 							make_shared<FunctionType>(strings(), strings(), FunctionType::Location::Revert))})
 {
diff --git a/libsolidity/codegen/ExpressionCompiler.cpp b/libsolidity/codegen/ExpressionCompiler.cpp
index 2ed19a833ccb..41cfcb69a89c 100644
--- a/libsolidity/codegen/ExpressionCompiler.cpp
+++ b/libsolidity/codegen/ExpressionCompiler.cpp
@@ -875,9 +875,8 @@ bool ExpressionCompiler::visit(FunctionCall const& _functionCall)
 			// jump if condition was met
 			m_context << Instruction::ISZERO << Instruction::ISZERO;
 			auto success = m_context.appendConditionalJump();
-			// condition was not met, abort
-			m_context << u256(0) << u256(0);
-			m_context << Instruction::REVERT;
+			// condition was not met, flag an error
+			m_context << Instruction::INVALID;
 			// the success branch
 			m_context << success;
 			break;
diff --git a/test/libsolidity/SolidityEndToEndTest.cpp b/test/libsolidity/SolidityEndToEndTest.cpp
index 68f8fbef3242..19665a26fb7e 100644
--- a/test/libsolidity/SolidityEndToEndTest.cpp
+++ b/test/libsolidity/SolidityEndToEndTest.cpp
@@ -9083,24 +9083,24 @@ BOOST_AUTO_TEST_CASE(invalid_instruction)
 	BOOST_CHECK(callContractFunction("f()") == encodeArgs());
 }
 
-BOOST_AUTO_TEST_CASE(assert)
-{
-	char const* sourceCode = R"(
-		contract C {
-			function f() {
-				assert(false);
-			}
-			function g(bool val) returns (bool) {
-				assert(val == true);
-				return true;
-			}
-		}
-	)";
-	compileAndRun(sourceCode, 0, "C");
-	BOOST_CHECK(callContractFunction("f()") == encodeArgs());
-	BOOST_CHECK(callContractFunction("g(bool)", false) == encodeArgs());
-	BOOST_CHECK(callContractFunction("g(bool)", true) == encodeArgs(true));
-}
+//BOOST_AUTO_TEST_CASE(assert)
+//{
+//	char const* sourceCode = R"(
+//		contract C {
+//			function f() {
+//				assert(false);
+//			}
+//			function g(bool val) returns (bool) {
+//				assert(val == true);
+//				return true;
+//			}
+//		}
+//	)";
+//	compileAndRun(sourceCode, 0, "C");
+//	BOOST_CHECK(callContractFunction("f()") == encodeArgs());
+//	BOOST_CHECK(callContractFunction("g(bool)", false) == encodeArgs());
+//	BOOST_CHECK(callContractFunction("g(bool)", true) == encodeArgs(true));
+//}
 
 BOOST_AUTO_TEST_CASE(revert)
 {