diff --git a/ipmid-api.h b/ipmid-api.h
index 34d3bbe..5da7636 100644
--- a/ipmid-api.h
+++ b/ipmid-api.h
@@ -94,5 +94,5 @@
     IPMI_CC_UNSPECIFIED_ERROR = 0xFF,
 };
 
-sd_bus *ipmid_get_sd_bus_connection(void);
+extern "C" sd_bus *ipmid_get_sd_bus_connection(void);
 #endif