diff --git a/libsolidity/analysis/StaticAnalyzer.cpp b/libsolidity/analysis/StaticAnalyzer.cpp
index c2dfb4e52e5c..c6c52bb97797 100644
--- a/libsolidity/analysis/StaticAnalyzer.cpp
+++ b/libsolidity/analysis/StaticAnalyzer.cpp
@@ -98,6 +98,13 @@ bool StaticAnalyzer::visit(EventDefinition const& _event)
 bool StaticAnalyzer::visit(ImportDirective const& _import)
 {
 	checkShadowingBuiltin(_import);
+	for (auto const& alias: _import.symbolAliases())
+	{
+		ASTString aliasName = *(alias.second.get());
+		for (string const name: m_globals)
+			if (name == aliasName)
+				warning(_import.location(), "Shadowing builtin symbol \"" + name + "\".");
+	}
 	return true;
 }