diff --git a/microcode_ctl.spec b/microcode_ctl.spec
index 03b4543..e58680b 100644
--- a/microcode_ctl.spec
+++ b/microcode_ctl.spec
@@ -78,6 +78,16 @@ fi
 /sbin/chkconfig --add microcode_ctl
 
 %triggerpostun -- kernel-utils
+# Only enable on Intel machines.
+vendor=`cat /proc/cpuinfo | grep "^vendor_id" | sort -u | awk -F ": " '{ print $2 }'`
+if [ "$vendor" != "GenuineIntel" ]; then
+    exit 0;
+fi
+# Microcode wasn't available until 686's.
+family=`cat /proc/cpuinfo | grep "^cpu family" | sort -u | awk -F ": " '{ print $2 }'`
+if [ $family -lt 6 ]; then
+    exit 0;
+fi
 /sbin/chkconfig --add microcode_ctl
 exit 0