diff --git a/grpc.def b/grpc.def
index f81aa1b..8456952 100644
--- a/grpc.def
+++ b/grpc.def
@@ -136,6 +136,8 @@
     grpc_raw_byte_buffer_from_reader
     gpr_log
     gpr_log_message
+    gpr_set_log_verbosity
+    gpr_log_verbosity_init
     gpr_set_log_function
     gpr_slice_ref
     gpr_slice_unref