diff --git a/io/include/dap_net.h b/io/include/dap_net.h
index 0f03dbb127e2b38ca133fe091496713dc708ff87..252aadd0c955b814a4756445e460a32e27cb43cb 100644
--- a/io/include/dap_net.h
+++ b/io/include/dap_net.h
@@ -49,7 +49,7 @@
 #define DAP_CFG_PARAM_LEGACY_PORT       "listen-port-tcp"
 
 #ifdef __cplusplus
-extern "c" {
+extern "C" {
 #endif