diff --git a/devices/pc/machine/att/6300/cga/640kb/debugger/machine.xml b/devices/pc/machine/att/6300/cga/640kb/debugger/machine.xml
index b747ac8bc..cf9ad626c 100644
--- a/devices/pc/machine/att/6300/cga/640kb/debugger/machine.xml
+++ b/devices/pc/machine/att/6300/cga/640kb/debugger/machine.xml
@@ -3,7 +3,7 @@
 <machine id="att6300" class="pc" border="1" pos="center" background="#FAEBD7">
 	<name pos="center">AT&amp;T Personal Computer 6300 with Color Display</name>
 	<computer id="att6300-640k" name="AT&amp;T 6300"/>
-	<cpu id="cpu8086" model="8086"/>
+	<cpu id="cpu8086" model="8086" cycles="8000000"/>
 	<ram id="ramLow" addr="0x00000" size="0xa0000"/>
 	<rom ref="/devices/pc/rom/att/6300/bios-143.xml"/>
 	<video ref="/devices/pc/video/cdp/cga/cdp-cga.xml"/>
diff --git a/devices/pc/machine/att/6300/cga/640kb/machine.xml b/devices/pc/machine/att/6300/cga/640kb/machine.xml
index e531c40a1..cb669a93c 100644
--- a/devices/pc/machine/att/6300/cga/640kb/machine.xml
+++ b/devices/pc/machine/att/6300/cga/640kb/machine.xml
@@ -7,7 +7,7 @@
 	<rom ref="/devices/pc/rom/att/6300/bios-143.xml"/>
 	<video ref="/devices/pc/video/cdp/cga/cdp-cga.xml"/>
 	<fdc ref="/disks/pc/compiled/library.xml"/>
-	<cpu id="cpu8086" model="8086" autostart="true" pos="left" padleft="8px" padbottom="8px">
+	<cpu id="cpu8086" model="8086" cycles="8000000" autostart="true" pos="left" padleft="8px" padbottom="8px">
 		<control type="button" binding="run">Run</control>
 		<control type="button" binding="reset">Reset</control>
 	</cpu>