diff --git a/Config.h b/Config.h
index 30f20f99..e9e846b6 100644
--- a/Config.h
+++ b/Config.h
@@ -9,6 +9,7 @@
 #ifndef CONFIG_H
 #define CONFIG_H
 
+#include "zncconfig.h"
 #include "ZNCString.h"
 
 class CFile;
diff --git a/ExecSock.h b/ExecSock.h
index 793daa6d..701658ad 100644
--- a/ExecSock.h
+++ b/ExecSock.h
@@ -9,6 +9,7 @@
 #ifndef EXEC_SOCK_H
 #define EXEC_SOCK_H
 
+#include "zncconfig.h"
 #include "Socket.h"
 #include <signal.h>
 
diff --git a/ZNCDebug.h b/ZNCDebug.h
index 83c17fec..4a9682ca 100644
--- a/ZNCDebug.h
+++ b/ZNCDebug.h
@@ -9,6 +9,7 @@
 #ifndef ZNCDEBUG_H
 #define ZNCDEBUG_H
 
+#include "zncconfig.h"
 #include <iostream>
 
 using std::cout;