diff --git a/c_os/kernel/interrupts/IntDispatcher.h b/c_os/kernel/interrupts/IntDispatcher.h
index b933f9d..7659dbc 100755
--- a/c_os/kernel/interrupts/IntDispatcher.h
+++ b/c_os/kernel/interrupts/IntDispatcher.h
@@ -27,7 +27,8 @@ public:
     // Vektor-Nummern
     enum {
         timer = 32,
-        keyboard = 33
+        keyboard = 33,
+        com1 = 36
     };
 
     // Initialisierung der ISR map mit einer Default-ISR.
diff --git a/c_os/kernel/interrupts/PIC.h b/c_os/kernel/interrupts/PIC.h
index 46b44aa..a3cd2c0 100755
--- a/c_os/kernel/interrupts/PIC.h
+++ b/c_os/kernel/interrupts/PIC.h
@@ -27,8 +27,9 @@ public:
 
     // IRQ-Nummern von Geraeten
     enum {
-        timer = 0,    // Programmable Interrupt Timer (PIT)
-        keyboard = 1  // Tastatur
+        timer = 0,     // Programmable Interrupt Timer (PIT)
+        keyboard = 1,  // Tastatur
+        com1 = 4
     };
 
     // Freischalten der Weiterleitung eines IRQs durch den PIC an die CPU