diff --git a/reactos/subsystems/mvdm/ntvdm/bios/bios32/vbe.c b/reactos/subsystems/mvdm/ntvdm/bios/bios32/vbe.c
index 735cdd25393..fc547c836f6 100644
--- a/reactos/subsystems/mvdm/ntvdm/bios/bios32/vbe.c
+++ b/reactos/subsystems/mvdm/ntvdm/bios/bios32/vbe.c
@@ -356,6 +356,7 @@ static VOID VbeSetExtendedRegisters(PSVGA_REGISTERS Registers)
 BOOLEAN WINAPI VbeSetExtendedVideoMode(BYTE ModeNumber)
 {
     PCVBE_MODE Mode = VbeGetModeByNumber(ModeNumber);
+    if (Mode == NULL) return FALSE;
 
     /* At this point, Mode->Registers shouldn't be NULL unless the mode is unimplemented */
     if (Mode->Registers == NULL)