diff --git a/sys/dev/drm2/i915/i915_drv.c b/sys/dev/drm2/i915/i915_drv.c
index c293b1ab5b93..f0c8867501b3 100644
--- a/sys/dev/drm2/i915/i915_drv.c
+++ b/sys/dev/drm2/i915/i915_drv.c
@@ -1237,7 +1237,7 @@ MODULE_DEPEND(i915kms, iicbus, 1, 1, 1);
 MODULE_DEPEND(i915kms, iic, 1, 1, 1);
 MODULE_DEPEND(i915kms, iicbb, 1, 1, 1);
 MODULE_PNP_INFO("U32:vendor;U32:device;P:#;D:#", vgapci, i915, pciidlist,
-    sizeof(pciidlist[0]), nitems(pciidlist));
+    sizeof(pciidlist[0]), nitems(pciidlist) - 1);
 
 /* We give fast paths for the really cool registers */
 #define NEEDS_FORCE_WAKE(dev_priv, reg) \
diff --git a/sys/dev/drm2/radeon/radeon_drv.c b/sys/dev/drm2/radeon/radeon_drv.c
index 9574bec4c728..bf3dd063c178 100644
--- a/sys/dev/drm2/radeon/radeon_drv.c
+++ b/sys/dev/drm2/radeon/radeon_drv.c
@@ -402,4 +402,4 @@ MODULE_DEPEND(radeonkms, iic, 1, 1, 1);
 MODULE_DEPEND(radeonkms, iicbb, 1, 1, 1);
 MODULE_DEPEND(radeonkms, firmware, 1, 1, 1);
 MODULE_PNP_INFO("U32:vendor;U32:device;P:#;D:#", vgapci, radeonkms,
-    pciidlist, sizeof(pciidlist[0]), nitems(pciidlist));
+    pciidlist, sizeof(pciidlist[0]), nitems(pciidlist) - 1);