diff --git a/cmake/config.h.in b/cmake/config.h.in
index 2a32b0c0..d03cdede 100644
--- a/cmake/config.h.in
+++ b/cmake/config.h.in
@@ -155,6 +155,11 @@
 #define APCUPSD
 #endif /* BUILD_APCUPSD */
 
+#cmakedefine BUILD_IOSTATS 1
+#ifdef BUILD_IOSTATS
+#define IOSTATS
+#endif /* BUILD_IOSTATS */
+
 #cmakedefine HAVE_ICONV 1
 
 #cmakedefine LUA_EXTRAS 1