diff --git a/common/serial.c b/common/serial.c
index 70f6261..bed907e 100644
--- a/common/serial.c
+++ b/common/serial.c
@@ -43,6 +43,7 @@
 serial_initfunc(mpc8xx_serial_initialize);
 serial_initfunc(pxa_serial_initialize);
 serial_initfunc(s3c24xx_serial_initialize);
+serial_initfunc(s5p_serial_initialize);
 
 void serial_register(struct serial_device *dev)
 {
@@ -78,12 +79,7 @@
 #endif /* CONFIG_SYS_NS16550_SERIAL */
 	pxa_serial_initialize();
 	s3c24xx_serial_initialize();
-#if defined(CONFIG_S5P)
-	serial_register(&s5p_serial0_device);
-	serial_register(&s5p_serial1_device);
-	serial_register(&s5p_serial2_device);
-	serial_register(&s5p_serial3_device);
-#endif
+	s5p_serial_initialize();
 #if defined(CONFIG_MPC512X)
 #if defined(CONFIG_SYS_PSC1)
 	serial_register(&serial1_device);
diff --git a/drivers/serial/serial_s5p.c b/drivers/serial/serial_s5p.c
index 43cbc4f..3c41242 100644
--- a/drivers/serial/serial_s5p.c
+++ b/drivers/serial/serial_s5p.c
@@ -221,3 +221,11 @@
 #error "CONFIG_SERIAL? missing."
 #endif
 }
+
+void s5p_serial_initialize(void)
+{
+	serial_register(&s5p_serial0_device);
+	serial_register(&s5p_serial1_device);
+	serial_register(&s5p_serial2_device);
+	serial_register(&s5p_serial3_device);
+}
diff --git a/include/serial.h b/include/serial.h
index 10fce02..ee7a53f 100644
--- a/include/serial.h
+++ b/include/serial.h
@@ -57,13 +57,6 @@
 extern struct serial_device uartlite_serial3_device;
 #endif
 
-#if defined(CONFIG_S5P)
-extern struct serial_device s5p_serial0_device;
-extern struct serial_device s5p_serial1_device;
-extern struct serial_device s5p_serial2_device;
-extern struct serial_device s5p_serial3_device;
-#endif
-
 #if defined(CONFIG_OMAP3_ZOOM2)
 extern struct serial_device zoom2_serial_device0;
 extern struct serial_device zoom2_serial_device1;