diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index e440f70e477a2a253609b1df604c4c981b386c29..4e8b26161a741a308694508cab7cf6292b7614f1 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -946,7 +946,6 @@ extern int i915_wait_ring(struct drm_device * dev, int n, const char *caller);
 #define IS_I830(dev) ((dev)->pci_device == 0x3577)
 #define IS_845G(dev) ((dev)->pci_device == 0x2562)
 #define IS_I85X(dev) ((dev)->pci_device == 0x3582)
-#define IS_I855(dev) ((dev)->pci_device == 0x3582)
 #define IS_I865G(dev) ((dev)->pci_device == 0x2572)
 
 #define IS_I915G(dev) ((dev)->pci_device == 0x2582 || (dev)->pci_device == 0x258a)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 8945656dc1dc4c27b3a42e5b0bdcf48bb224f07f..0be624a52e50a9ddccee1efa9931722a0c3b32fc 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4291,7 +4291,7 @@ void intel_init_clock_gating(struct drm_device *dev)
 		dstate |= DSTATE_PLL_D3_OFF | DSTATE_GFX_CLOCK_GATING |
 			DSTATE_DOT_CLOCK_GATING;
 		I915_WRITE(D_STATE, dstate);
-	} else if (IS_I855(dev) || IS_I865G(dev)) {
+	} else if (IS_I85X(dev) || IS_I865G(dev)) {
 		I915_WRITE(RENCLK_GATE_D1, SV_CLOCK_GATE_DISABLE);
 	} else if (IS_I830(dev)) {
 		I915_WRITE(DSPCLK_GATE_D, OVRUNIT_CLOCK_GATE_DISABLE);
@@ -4375,7 +4375,7 @@ static void intel_init_display(struct drm_device *dev)
 	else if (IS_I865G(dev))
 		dev_priv->display.get_display_clock_speed =
 			i865_get_display_clock_speed;
-	else if (IS_I855(dev))
+	else if (IS_I85X(dev))
 		dev_priv->display.get_display_clock_speed =
 			i855_get_display_clock_speed;
 	else /* 852, 830 */