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-rw-r--r--libsolidity/formal/SMTChecker.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/libsolidity/formal/SMTChecker.cpp b/libsolidity/formal/SMTChecker.cpp
index a8595190..7e75df87 100644
--- a/libsolidity/formal/SMTChecker.cpp
+++ b/libsolidity/formal/SMTChecker.cpp
@@ -29,6 +29,7 @@
using namespace std;
using namespace dev;
+using namespace langutil;
using namespace dev::solidity;
SMTChecker::SMTChecker(ErrorReporter& _errorReporter, ReadCallback::Callback const& _readFileCallback):