diff --git a/dlls/krnl386.exe16/int10.c b/dlls/krnl386.exe16/int10.c
index dfba761d431..2ac9703b2cc 100644
--- a/dlls/krnl386.exe16/int10.c
+++ b/dlls/krnl386.exe16/int10.c
@@ -750,7 +750,7 @@ static BOOL INT10_SetVideoMode( BIOSDATA *data, WORD mode )
                ptr->Width, ptr->Height, ptr->Depth,
                clearScreen ? "cleared" : "preserved" );
 
-        if ( VGA_SetMode(mode) )
+        if (!VGA_SetMode(mode))
             return FALSE;
     }
 
diff --git a/dlls/krnl386.exe16/int33.c b/dlls/krnl386.exe16/int33.c
index 7226816a014..0f03ac7aa06 100644
--- a/dlls/krnl386.exe16/int33.c
+++ b/dlls/krnl386.exe16/int33.c
@@ -295,7 +295,7 @@ void DOSVM_Int33Message(UINT message,WPARAM wParam,LPARAM lParam)
   WORD mask = 0;
   unsigned Height, Width, SX=1, SY=1;
 
-  if (!VGA_GetMode(&Height,&Width,NULL)) {
+  if (VGA_GetMode(&Height, &Width, NULL)) {
     /* may need to do some coordinate scaling */
     if (Width)
       SX = 640/Width;
diff --git a/dlls/krnl386.exe16/vga.c b/dlls/krnl386.exe16/vga.c
index f1b632e24e4..ade19f7c691 100644
--- a/dlls/krnl386.exe16/vga.c
+++ b/dlls/krnl386.exe16/vga.c
@@ -735,7 +735,7 @@ static char*VGA_AlphaBuffer(void)
 
 typedef struct {
   unsigned Xres, Yres, Depth;
-  int ret;
+  BOOL ret;
 } ModeSet;
 
 
@@ -780,7 +780,7 @@ static void WINAPI VGA_DoSetMode(ULONG_PTR arg)
 {
     HRESULT	res;
     ModeSet *par = (ModeSet *)arg;
-    par->ret=1;
+    par->ret = FALSE;
 
     if (lpddraw) VGA_DoExit(0);
     if (!lpddraw) {
@@ -845,7 +845,7 @@ static void WINAPI VGA_DoSetMode(ULONG_PTR arg)
         /* poll every 20ms (50fps should provide adequate responsiveness) */
         VGA_InstallTimer(20);
     }
-    par->ret=0;
+    par->ret = TRUE;
     return;
 }
 
@@ -872,7 +872,7 @@ const VGA_MODE *VGA_GetModeInfo(WORD mode)
     return NULL;
 }
 
-static int VGA_SetGraphicMode(WORD mode)
+static BOOL VGA_SetGraphicMode(WORD mode)
 {
     ModeSet par;
     int     newSize;
@@ -954,7 +954,7 @@ static int VGA_SetGraphicMode(WORD mode)
     return par.ret;
 }
 
-int VGA_SetMode(WORD mode)
+BOOL VGA_SetMode(WORD mode)
 {
     const VGA_MODE *ModeInfo;
     /* get info on VGA mode & set appropriately */
@@ -980,17 +980,17 @@ int VGA_SetMode(WORD mode)
     {
        return VGA_SetGraphicMode(mode);
     }
-    return 0; /* assume all good & return zero */
+    return TRUE; /* assume all good & return TRUE */
 }
 
-int VGA_GetMode(unsigned*Height,unsigned*Width,unsigned*Depth)
+BOOL VGA_GetMode(unsigned *Height, unsigned *Width, unsigned *Depth)
 {
-    if (!lpddraw) return 1;
-    if (!lpddsurf) return 1;
+    if (!lpddraw) return FALSE;
+    if (!lpddsurf) return FALSE;
     if (Height) *Height=sdesc.dwHeight;
     if (Width) *Width=sdesc.dwWidth;
     if (Depth) *Depth=sdesc.ddpfPixelFormat.u1.dwRGBBitCount;
-    return 0;
+    return TRUE;
 }
 
 static void VGA_Exit(void)
diff --git a/dlls/krnl386.exe16/vga.h b/dlls/krnl386.exe16/vga.h
index 5d79567c1d7..b4976f6e71b 100644
--- a/dlls/krnl386.exe16/vga.h
+++ b/dlls/krnl386.exe16/vga.h
@@ -52,10 +52,10 @@ extern const VGA_MODE VGA_modelist[];
 
 /* all vga modes */
 const VGA_MODE *VGA_GetModeInfo(WORD mode);
-int VGA_SetMode(WORD mode);
+BOOL VGA_SetMode(WORD mode);
 
 /* graphics mode */
-int VGA_GetMode(unsigned*Height,unsigned*Width,unsigned*Depth);
+BOOL VGA_GetMode(unsigned *Height, unsigned *Width, unsigned *Depth);
 void VGA_SetPalette(PALETTEENTRY*pal,int start,int len);
 void VGA_SetColor16(int reg,int color);
 char VGA_GetColor16(int reg);