diff --git a/projekte/protothreads/Makefile b/projekte/protothreads/Makefile
index 272ec82..e7b7e9c 100644
--- a/projekte/protothreads/Makefile
+++ b/projekte/protothreads/Makefile
@@ -32,7 +32,7 @@ CSTANDARD = -std=gnu99
 CDEFS = -DF_CPU=$(F_CPU)UL
 
 # Place -I options here
-CINCS = -Ipt 
+CINCS = -Ipt -Itimer
 
 
 CDEBUG = -g$(DEBUG)
diff --git a/projekte/protothreads/example.c b/projekte/protothreads/example.c
index 82844a4..72c4513 100644
--- a/projekte/protothreads/example.c
+++ b/projekte/protothreads/example.c
@@ -4,8 +4,8 @@
 #include "util/delay.h"
 
 #include "pt.h"
-#include "timer/clock.h"
-#include "timer/timer.h"
+#include "clock.h"
+#include "timer.h"
 
 /* TIMER_DELAY macro for convenience */
 #define TIMER_DELAY(pt, timer, t) \
diff --git a/projekte/protothreads/timer/timer.c b/projekte/protothreads/timer/timer.c
index 44ab3f1..74eedf6 100644
--- a/projekte/protothreads/timer/timer.c
+++ b/projekte/protothreads/timer/timer.c
@@ -45,8 +45,8 @@
  * $Id: timer.c,v 1.2 2006/06/12 08:00:30 adam Exp $
  */
 
-#include "timer/clock.h"
-#include "timer/timer.h"
+#include "clock.h"
+#include "timer.h"
 
 /*---------------------------------------------------------------------------*/
 /**