diff --git a/configure.ac b/configure.ac
index a52830b38..44a86c248 100644
--- a/configure.ac
+++ b/configure.ac
@@ -238,6 +238,7 @@ if test -n "$enable_s3"; then
   declare -a aws_version_tokens=($(printf '#include <aws/core/VersionConfig.h>\nAWS_SDK_VERSION_STRING' | $CPP $CPPFLAGS - | grep -v '^#.*' | sed 's/"//g' | tr '.' ' '))
   AC_DEFINE_UNQUOTED([AWS_VERSION_MAJOR], ${aws_version_tokens@<:@0@:>@}, [Major version of aws-sdk-cpp.])
   AC_DEFINE_UNQUOTED([AWS_VERSION_MINOR], ${aws_version_tokens@<:@1@:>@}, [Minor version of aws-sdk-cpp.])
+  AC_DEFINE_UNQUOTED([AWS_VERSION_PATCH], ${aws_version_tokens@<:@2@:>@}, [Patch version of aws-sdk-cpp.])
 fi
 
 
diff --git a/src/libstore/s3-binary-cache-store.cc b/src/libstore/s3-binary-cache-store.cc
index cd547a964..1e5e264fc 100644
--- a/src/libstore/s3-binary-cache-store.cc
+++ b/src/libstore/s3-binary-cache-store.cc
@@ -56,6 +56,10 @@ class AwsLogger : public Aws::Utils::Logging::FormattedLogSystem
     {
         debug("AWS: %s", chomp(statement));
     }
+
+#if !(AWS_VERSION_MAJOR <= 1 && AWS_VERSION_MINOR <= 7 && AWS_VERSION_PATCH <= 115)
+    void Flush() override {}
+#endif
 };
 
 static void initAWS()