diff --git a/include/gsl_assert.h b/include/gsl_assert.h
index 81cfd13..51e8ab6 100644
--- a/include/gsl_assert.h
+++ b/include/gsl_assert.h
@@ -20,6 +20,7 @@
 #define GSL_CONTRACTS_H
 
 #include <exception>
+#include <stdexcept>
 
 //
 // There are three configuration options for this GSL implementation's behavior
@@ -42,10 +43,6 @@
 // GSL.assert: assertions
 //
 
-#if defined(GSL_THROW_ON_CONTRACT_VIOLATION)
-
-#include <stdexcept>
-
 namespace gsl
 {
 struct fail_fast : public std::runtime_error 
@@ -54,6 +51,8 @@ struct fail_fast : public std::runtime_error
 };
 }
 
+#if defined(GSL_THROW_ON_CONTRACT_VIOLATION)
+
 #define Expects(cond)  if (!(cond)) \
     throw gsl::fail_fast("GSL: Precondition failure at " __FILE__ ": " GSL_STRINGIFY(__LINE__));
 #define Ensures(cond)  if (!(cond)) \