1 files changed, 2 insertions, 1 deletions
diff --git a/config.h b/config.h
index e7b1bb36..9b6d2472 100644
--- a/config.h
+++ b/config.h
@@ -1156,7 +1156,8 @@ NAMESPACE_END
 
 // nullptr_t: MS at VS2010 (16.00); GCC at 4.6; Clang at 3.3; Intel 10.0; SunCC 5.13.
 #if (CRYPTOPP_MSC_VERSION >= 1600) || __has_feature(cxx_nullptr) || \
-	(__INTEL_COMPILER >= 1000) || (CRYPTOPP_GCC_VERSION >= 40600) || (__SUNPRO_CC >= 0x5130)
+	(__INTEL_COMPILER >= 1000) || (CRYPTOPP_GCC_VERSION >= 40600) || \
+    (__SUNPRO_CC >= 0x5130) || defined(__IBMCPP_NULLPTR)
 # define CRYPTOPP_CXX11_NULLPTR 1
 #endif // nullptr_t compilers