diff --git a/reactos/subsystems/ntvdm/cpu/bop.c b/reactos/subsystems/ntvdm/cpu/bop.c
index 88a41dde9ef..d4f2430c61b 100644
--- a/reactos/subsystems/ntvdm/cpu/bop.c
+++ b/reactos/subsystems/ntvdm/cpu/bop.c
@@ -9,7 +9,7 @@
 
 /* INCLUDES *******************************************************************/
 
-// #define NDEBUG
+#define NDEBUG
 
 #include "emulator.h"
 #include "bop.h"
@@ -44,7 +44,7 @@ VOID WINAPI EmulatorBiosOperation(PFAST486_STATE State, UCHAR BopCode)
     if (BopProc[BopCode] != NULL)
         BopProc[BopCode](Stack);
     else
-        DPRINT("Invalid BOP code: 0x%02X\n", BopCode);
+        DPRINT1("Invalid BOP code: 0x%02X\n", BopCode);
 }
 
 /* EOF */
diff --git a/reactos/subsystems/ntvdm/int32.c b/reactos/subsystems/ntvdm/int32.c
index 72386ad8733..86bd226cd7f 100644
--- a/reactos/subsystems/ntvdm/int32.c
+++ b/reactos/subsystems/ntvdm/int32.c
@@ -9,7 +9,7 @@
 
 /* INCLUDES *******************************************************************/
 
-// #define NDEBUG
+#define NDEBUG
 
 #include "emulator.h"
 #include "int32.h"