diff --git a/ka/crt/fmt/printf.k b/ka/crt/fmt/printf.k
index 64d5545..32056d1 100644
--- a/ka/crt/fmt/printf.k
+++ b/ka/crt/fmt/printf.k
@@ -13,11 +13,16 @@ putc:
 ; int printf(const char *fmt, ...)
 ;
 printf:
+    enter 0
+
     mov ax2, ax0
     mov ax0, putc
     mov ax1, STRLEN_MAX
-    lea ax3, b[rsp+8]
-    jmp _doprnt
+    lea ax3, b[rbp+16]
+    call _doprnt
+
+    leave
+    ret
 
 ;
 ; Print a string