diff --git a/src/etc/etc.macppc/MAKEDEV b/src/etc/etc.macppc/MAKEDEV
index 0b3508af..de1d77d9 100644
--- a/src/etc/etc.macppc/MAKEDEV
+++ b/src/etc/etc.macppc/MAKEDEV
@@ -222,7 +222,7 @@ std)
 	M ksyms		c 43 0 640 kmem
 	M klog		c 6 0 600
 	M xf86		c 2 4 600
-	M openprom	c 82 0 640 kmem
+	M openprom	c 82 0 600
 	;;
 
 
diff --git a/src/etc/etc.sparc/MAKEDEV b/src/etc/etc.sparc/MAKEDEV
index 7bc821d6..e1c4b8fd 100644
--- a/src/etc/etc.sparc/MAKEDEV
+++ b/src/etc/etc.sparc/MAKEDEV
@@ -222,7 +222,7 @@ std)
 	M ksyms		c 122 0 640 kmem
 	M klog		c 16 0 600
 	M eeprom	c 3 11	600
-	M openprom	c 70 0	640 kmem
+	M openprom	c 70 0	600
 	;;
 
 vscsi*)
diff --git a/src/etc/etc.sparc64/MAKEDEV b/src/etc/etc.sparc64/MAKEDEV
index dedebac8..957e0c22 100644
--- a/src/etc/etc.sparc64/MAKEDEV
+++ b/src/etc/etc.sparc64/MAKEDEV
@@ -239,7 +239,7 @@ std)
 	M stderr	c 24 2
 	M ksyms		c 76 0 640 kmem
 	M klog		c 16 0 600
-	M openprom	c 70 0 640 kmem
+	M openprom	c 70 0 600
 	M mdesc		c 70 1 640 kmem
 	;;