diff --git a/src/add-ons/kernel/network/ppp/shared/libkernelppp/KPPPConfigurePacket.cpp b/src/add-ons/kernel/network/ppp/shared/libkernelppp/KPPPConfigurePacket.cpp
index 82207eb092..e9424ea9a0 100644
--- a/src/add-ons/kernel/network/ppp/shared/libkernelppp/KPPPConfigurePacket.cpp
+++ b/src/add-ons/kernel/network/ppp/shared/libkernelppp/KPPPConfigurePacket.cpp
@@ -16,6 +16,8 @@
 #include <KPPPConfigurePacket.h>
 #include <KPPPInterface.h>
 
+#include <arpa/inet.h>
+
 
 /*!	\brief Constructor.
 
diff --git a/src/add-ons/kernel/network/ppp/shared/libkernelppp/KPPPInterface.cpp b/src/add-ons/kernel/network/ppp/shared/libkernelppp/KPPPInterface.cpp
index cdb6e9809c..d5ba448dfc 100644
--- a/src/add-ons/kernel/network/ppp/shared/libkernelppp/KPPPInterface.cpp
+++ b/src/add-ons/kernel/network/ppp/shared/libkernelppp/KPPPInterface.cpp
@@ -23,6 +23,7 @@
 // void (KernelExport.h) and once with int (stdio.h).
 #include <cstdio>
 #include <cstring>
+#include <arpa/inet.h>
 
 #include <ByteOrder.h>
 #include <net_buffer.h>
diff --git a/src/add-ons/kernel/network/ppp/shared/libkernelppp/KPPPStateMachine.cpp b/src/add-ons/kernel/network/ppp/shared/libkernelppp/KPPPStateMachine.cpp
index 181110ce58..04f7700b7f 100644
--- a/src/add-ons/kernel/network/ppp/shared/libkernelppp/KPPPStateMachine.cpp
+++ b/src/add-ons/kernel/network/ppp/shared/libkernelppp/KPPPStateMachine.cpp
@@ -22,6 +22,7 @@
 #include <KPPPUtils.h>
 
 #include <net/if.h>
+#include <arpa/inet.h>
 
 #include <ByteOrder.h>
 #include <net_buffer.h>