diff --git a/utils/releasetools/changelog.tcl b/utils/releasetools/changelog.tcl
index 9b3a2cdd..06e38ba9 100755
--- a/utils/releasetools/changelog.tcl
+++ b/utils/releasetools/changelog.tcl
@@ -1,12 +1,17 @@
 #!/usr/bin/env tclsh
 
-if {[llength $::argv] != 2} {
-    puts "Usage: $::argv0 <branch> <version>"
+if {[llength $::argv] != 2 && [llength $::argv] != 3} {
+    puts "Usage: $::argv0 <branch> <version> \[<num-commits>\]"
     exit 1
 }
 
 set branch [lindex $::argv 0]
 set ver [lindex $::argv 1]
+if {[llength $::argv] == 3} {
+    set count [lindex ::$argv 2]
+} else {
+    set count 100
+}
 
 set template {
 ================================================================================
@@ -21,7 +26,7 @@ append template "\n\n"
 set date [clock format [clock seconds]]
 set template [string map [list %ver% $ver %date% $date] $template]
 
-append template [exec git log $branch~100..$branch "--format=format:%an in commit %h:%n %s" --shortstat]
+append template [exec git log $branch~$count..$branch "--format=format:%an in commit %h:%n %s" --shortstat]
 
 #Older, more verbose version.
 #