diff --git a/src/CPUSensorMain.cpp b/src/CPUSensorMain.cpp
index 1c5574b..fd9e543 100644
--- a/src/CPUSensorMain.cpp
+++ b/src/CPUSensorMain.cpp
@@ -43,7 +43,9 @@
 
 // clang-format off
 // this needs to be included last or we'll have build issues
+extern "C" {
 #include <linux/peci-ioctl.h>
+}
 #if !defined(PECI_MBX_INDEX_DDR_DIMM_TEMP)
 #define PECI_MBX_INDEX_DDR_DIMM_TEMP MBX_INDEX_DDR_DIMM_TEMP
 #endif