diff --git a/src/add-ons/kernel/network/ppp/ipcp/Protocol.cpp b/src/add-ons/kernel/network/ppp/ipcp/Protocol.cpp
index 1d1e0665ac..a6effb7d64 100644
--- a/src/add-ons/kernel/network/ppp/ipcp/Protocol.cpp
+++ b/src/add-ons/kernel/network/ppp/ipcp/Protocol.cpp
@@ -21,7 +21,7 @@
 #ifdef _KERNEL_MODE
 	#define spawn_thread spawn_kernel_thread
 	#define printf dprintf
-#elif DEBUG
+#else
 	#include <cstdio>
 #endif
 
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 870ef0e715..0088036005 100644
--- a/src/add-ons/kernel/network/ppp/shared/libkernelppp/KPPPStateMachine.cpp
+++ b/src/add-ons/kernel/network/ppp/shared/libkernelppp/KPPPStateMachine.cpp
@@ -20,7 +20,7 @@
 #ifdef _KERNEL_MODE
 	#define spawn_thread spawn_kernel_thread
 	#define printf dprintf
-#elif DEBUG
+#else DEBUG
 	#include <cstdio>
 #endif