Add 'extern "C"' to error.h.
diff --git a/src/core/lib/iomgr/error.h b/src/core/lib/iomgr/error.h
index 7e2fd7a..00ace8a 100644
--- a/src/core/lib/iomgr/error.h
+++ b/src/core/lib/iomgr/error.h
@@ -40,6 +40,10 @@
#include <grpc/status.h>
#include <grpc/support/time.h>
+#ifdef __cplusplus
+extern "C" {
+#endif
+
/// Opaque representation of an error.
/// Errors are refcounted objects that represent the result of an operation.
/// Ownership laws:
@@ -204,4 +208,8 @@
#define GRPC_LOG_IF_ERROR(what, error) \
grpc_log_if_error((what), (error), __FILE__, __LINE__)
+#ifdef __cplusplus
+}
+#endif
+
#endif /* GRPC_CORE_LIB_IOMGR_ERROR_H */