diff --git a/ChangeLog b/ChangeLog
index 532dbb72..84062c2f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2007-04-05  Doug MacEachern  <dougm@hyperic.com>
+
+        * [SIGAR-46] Fix cpu_info.{mhz,cache_size} fields in UML vms
+
 2007-03-29  Doug MacEachern  <dougm@hyperic.com>
 
         *  Fix cpu ticks to msec on linux/ia64
diff --git a/src/os/linux/linux_sigar.c b/src/os/linux/linux_sigar.c
index a33e7962..1354eea0 100644
--- a/src/os/linux/linux_sigar.c
+++ b/src/os/linux/linux_sigar.c
@@ -1521,6 +1521,10 @@ static int get_cpu_info(sigar_t *sigar, sigar_cpu_info_t *info,
 
     int found = 0;
 
+    /* UML vm wont have "cpu MHz" or "cache size" fields */
+    info->mhz        = 0;
+    info->cache_size = 0;
+
 #ifdef __powerpc64__
     SIGAR_SSTRCPY(info->vendor, "IBM");
 #endif