diff --git a/dlls/winedos/int31.c b/dlls/winedos/int31.c
index d5a9e91f7da..28e93021b82 100644
--- a/dlls/winedos/int31.c
+++ b/dlls/winedos/int31.c
@@ -1062,7 +1062,7 @@ void WINAPI DOSVM_Int31Handler( CONTEXT86 *context )
         break;
 
     case 0x0300:  /* Simulate real mode interrupt */
-        TRACE( "Simulate real mode interrupt %d.\n", BL_reg(context));
+        TRACE( "Simulate real mode interrupt %02x.\n", BL_reg(context));
         DOSVM_CallRMInt( context );
         break;