diff --git a/Changelog.md b/Changelog.md
index 26c958076..1b5233cfa 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -24,6 +24,7 @@ Bugfixes:
  * Source Locations: Properly set source location of scoped blocks.
  * Standard JSON: Properly allow the ``inliner`` setting under ``settings.optimizer.details``.
  * Type Checker: Fix internal compiler error related to having mapping types in constructor parameter for abstract contracts.
+ * Type Checker: Fix internal compiler error when attempting to use an invalid external function type on pre-byzantium EVMs.
 
 
 AST Changes:
diff --git a/libsolidity/analysis/TypeChecker.cpp b/libsolidity/analysis/TypeChecker.cpp
index 22aff45d8..113755650 100644
--- a/libsolidity/analysis/TypeChecker.cpp
+++ b/libsolidity/analysis/TypeChecker.cpp
@@ -721,7 +721,7 @@ void TypeChecker::endVisit(FunctionTypeName const& _funType)
 		{
 			solAssert(t->annotation().type, "Type not set for parameter.");
 			if (!t->annotation().type->interfaceType(false).get())
-				m_errorReporter.typeError(2582_error, t->location(), "Internal type cannot be used for external function type.");
+				m_errorReporter.fatalTypeError(2582_error, t->location(), "Internal type cannot be used for external function type.");
 		}
 		solAssert(fun.interfaceType(false), "External function type uses internal types.");
 	}
diff --git a/test/libsolidity/syntaxTests/iceRegressionTests/calling_external_function_via_local_variable_with_invalid_type.sol b/test/libsolidity/syntaxTests/iceRegressionTests/calling_external_function_via_local_variable_with_invalid_type.sol
new file mode 100644
index 000000000..7257ef0f7
--- /dev/null
+++ b/test/libsolidity/syntaxTests/iceRegressionTests/calling_external_function_via_local_variable_with_invalid_type.sol
@@ -0,0 +1,8 @@
+contract C {
+    function f() public {
+        function() external returns (function() internal) getCallback;
+        getCallback();
+    }
+}
+// ----
+// TypeError 2582: (76-96): Internal type cannot be used for external function type.
diff --git a/test/libsolidity/syntaxTests/iceRegressionTests/calling_external_function_via_parameter_with_invalid_type.sol b/test/libsolidity/syntaxTests/iceRegressionTests/calling_external_function_via_parameter_with_invalid_type.sol
new file mode 100644
index 000000000..9bb40242e
--- /dev/null
+++ b/test/libsolidity/syntaxTests/iceRegressionTests/calling_external_function_via_parameter_with_invalid_type.sol
@@ -0,0 +1,9 @@
+contract C {
+    function f(
+        function() external returns (function() internal) getCallback
+    ) public {
+        getCallback();
+    }
+}
+// ----
+// TypeError 2582: (66-86): Internal type cannot be used for external function type.