Index: uspace/lib/c/generic/io/klog.c
===================================================================
--- uspace/lib/c/generic/io/klog.c	(revision 711a38b37af771adb8914e35f8d91da5b5d2ef07)
+++ uspace/lib/c/generic/io/klog.c	(revision a801688bbb63ce8e1f39927867b7500c306a8b52)
@@ -39,4 +39,5 @@
 #include <unistd.h>
 #include <errno.h>
+#include <abi/klog.h>
 #include <io/klog.h>
 #include <io/printf_core.h>
@@ -44,5 +45,5 @@
 size_t klog_write(const void *buf, size_t size)
 {
-	ssize_t ret = (ssize_t) __SYSCALL3(SYS_KLOG, 1, (sysarg_t) buf, size);
+	ssize_t ret = (ssize_t) __SYSCALL3(SYS_KLOG, KLOG_WRITE, (sysarg_t) buf, size);
 	
 	if (ret >= 0)
@@ -54,5 +55,5 @@
 void klog_update(void)
 {
-	(void) __SYSCALL3(SYS_KLOG, 1, (uintptr_t) NULL, 0);
+	(void) __SYSCALL3(SYS_KLOG, KLOG_UPDATE, (uintptr_t) NULL, 0);
 }
 
Index: uspace/lib/c/include/stdio.h
===================================================================
--- uspace/lib/c/include/stdio.h	(revision 711a38b37af771adb8914e35f8d91da5b5d2ef07)
+++ uspace/lib/c/include/stdio.h	(revision a801688bbb63ce8e1f39927867b7500c306a8b52)
@@ -40,4 +40,5 @@
 #include <str.h>
 #include <io/verify.h>
+#include <abi/klog.h>
 
 #define EOF  (-1)
@@ -51,5 +52,5 @@
 		int _n = snprintf(_buf, sizeof(_buf), fmt, ##__VA_ARGS__); \
 		if (_n > 0) \
-			(void) __SYSCALL3(SYS_KLOG, 1, (sysarg_t) _buf, str_size(_buf)); \
+			(void) __SYSCALL3(SYS_KLOG, KLOG_WRITE, (sysarg_t) _buf, str_size(_buf)); \
 	}