diff --git a/src/console/printk.c b/src/console/printk.c
index 1d6b9bf..2fa160b4 100644
--- a/src/console/printk.c
+++ b/src/console/printk.c
@@ -21,7 +21,7 @@
 	console_tx_byte(byte);
 }
 
-void wrap_putchar(unsigned char byte, void *data)
+static void wrap_putchar(unsigned char byte, void *data)
 {
 	do_putchar(byte);
 }
@@ -61,4 +61,3 @@
 	console_tx_flush();
 }
 #endif
-