diff --git a/src/aws-cpp-sdk-core/include/aws/core/utils/crypto/SecureRandom.h b/src/aws-cpp-sdk-core/include/aws/core/utils/crypto/SecureRandom.h
index 2d5e56b7b02..fca096cfe0f 100644
--- a/src/aws-cpp-sdk-core/include/aws/core/utils/crypto/SecureRandom.h
+++ b/src/aws-cpp-sdk-core/include/aws/core/utils/crypto/SecureRandom.h
@@ -6,6 +6,7 @@
 #include <type_traits>
 #include <memory>
 #include <cassert>
+#include <cstdint>
 
 namespace Aws
 {