diff --git a/libexec/sourcezap/functions/print.sh b/libexec/sourcezap/functions/print.sh
index b5d395f..8bb326e 100755
--- a/libexec/sourcezap/functions/print.sh
+++ b/libexec/sourcezap/functions/print.sh
@@ -2,10 +2,10 @@
 
 printok()
 {
-    printf "ok: %s\n" "${1}" > /dev/stdout
+    printf "sourcezap: %s\n" "${1}" > /dev/stdout
 }
 
 printerr()
 {
-    printf "error: %s\n" "${1}" > /dev/stderr
+    printf "sourcezap: %s\n" "${1}" > /dev/stderr
 }
diff --git a/share/sourcezap/CHANGELOG b/share/sourcezap/CHANGELOG
index 51d8056..cfb6a8d 100644
--- a/share/sourcezap/CHANGELOG
+++ b/share/sourcezap/CHANGELOG
@@ -2,6 +2,10 @@
 
 * vNEXT
 
+**** Format log messages with program name
+This change formats log messages written to standard output
+and standard error with the pattern ~sourcezap: <message>~
+
 **** Replace chmod with -M switch
 This change replaces chmod with the -M switch. The -M switch
 is given to the ~pw useradd~ command in the ~setup-user~