diff --git a/src/compat-api.h b/src/compat-api.h
index cb68cfe..0a04396 100644
--- a/src/compat-api.h
+++ b/src/compat-api.h
@@ -44,7 +44,4 @@
 #define ADJUST_FRAME_ARGS_DECL ScrnInfoPtr arg, int x, int y
 #define ADJUST_FRAME_ARGS(arg, x, y) arg, x, y
 
-#define SWITCH_MODE_ARGS_DECL ScrnInfoPtr arg, DisplayModePtr mode
-#define SWITCH_MODE_ARGS(arg, m) arg, m
-
 #endif
diff --git a/src/ct_dga.c b/src/ct_dga.c
index 2a33820..a6ee66e 100644
--- a/src/ct_dga.c
+++ b/src/ct_dga.c
@@ -176,7 +176,7 @@ CHIPS_SetMode(
 	pScrn->displayWidth = pMode->bytesPerScanline /
 			      (pMode->bitsPerPixel >> 3);
 
-        CHIPSSwitchMode(SWITCH_MODE_ARGS(pScrn, pMode->mode));
+        CHIPSSwitchMode(pScrn, pMode->mode);
    }
 
    return TRUE;
diff --git a/src/ct_driver.c b/src/ct_driver.c
index fc9b50f..e09ab4a 100644
--- a/src/ct_driver.c
+++ b/src/ct_driver.c
@@ -3963,7 +3963,7 @@ CHIPSScreenInit(SCREEN_INIT_ARGS_DECL)
 
 /* Mandatory */
 Bool
-CHIPSSwitchMode(SWITCH_MODE_ARGS_DECL)
+CHIPSSwitchMode(ScrnInfoPtr arg, DisplayModePtr mode)
 {
     SCRN_INFO_PTR(arg);
     CHIPSPtr cPtr = CHIPSPTR(pScrn);
diff --git a/src/ct_driver.h b/src/ct_driver.h
index 55869bb..c3af746 100644
--- a/src/ct_driver.h
+++ b/src/ct_driver.h
@@ -383,7 +383,7 @@ extern unsigned int ChipsReg32HiQV[];
 /* Prototypes */
 
 void CHIPSAdjustFrame(ADJUST_FRAME_ARGS_DECL);
-Bool CHIPSSwitchMode(SWITCH_MODE_ARGS_DECL);
+Bool CHIPSSwitchMode(ScrnInfoPtr arg, DisplayModePtr mode);
 
 /* video */
 void CHIPSInitVideo(ScreenPtr pScreen);