diff --git a/src/kernel/log.c b/src/kernel/log.c
index ff22727..0ea6822 100644
--- a/src/kernel/log.c
+++ b/src/kernel/log.c
@@ -22,10 +22,17 @@
 				break;
 			}
 
+			case 'p':
+				vga_put('0');
+				vga_put('x');
+
 			case 'x': {
 				// consider hex always unsigned
 				uint x = (uint)va_arg(args, uint);
-				vga_putx(x);
+				if (x)
+					vga_putx(x);
+				else
+					vga_put('0');
 				break;
 			}