diff --git a/config.h b/config.h
index 873158bf..209c035f 100644
--- a/config.h
+++ b/config.h
@@ -1010,6 +1010,12 @@ NAMESPACE_END
 #  define CRYPTOPP_CXX11_ALIGNOF 1
 #endif // alignof
 
+// lambdas: MS at VS2012 (17.00); GCC at 4.9; Clang at 3.3; Intel 12.0; SunCC 5.14.
+#if (CRYPTOPP_MSC_VERSION >= 1700) || __has_feature(cxx_lambda) || \
+	(__INTEL_COMPILER >= 1200) || (CRYPTOPP_GCC_VERSION >= 40900) || (__SUNPRO_CC >= 0x5140)
+#  define CRYPTOPP_CXX11_LAMBDA 1
+#endif // lambdas
+
 // noexcept: MS at VS2015 (19.00); GCC at 4.6; Clang at 3.0; Intel 14.0; SunCC 5.13.
 #if (CRYPTOPP_MSC_VERSION >= 1900) || __has_feature(cxx_noexcept) || \
 	(__INTEL_COMPILER >= 1400) || (CRYPTOPP_GCC_VERSION >= 40600) || (__SUNPRO_CC >= 0x5130)