diff --git a/chkcrontab_lib.py b/chkcrontab_lib.py
index 12778cdb7f6b8f452034c4648df8a6c77ee38b3b..54cc70397f7487697fe613796ded161af9d52419 100755
--- a/chkcrontab_lib.py
+++ b/chkcrontab_lib.py
@@ -681,6 +681,11 @@ class CronLineAssignment(object):
                    'Variable assignments in crontabs are not like shell.'
                    '  $VAR is not expanded.')
 
+    if re.match('".+" ?#', self.variable) or re.match('[^"].*#', self.variable):
+      log.LineError(log.MSG_COMMENT,
+                   'Variable assignments in crontabs are not like shell.'
+                   '  # comment is not allowed.')
+
 
 class CronLineTimeAction(object):
   """Checks cron lines that specify a time and an action.
@@ -881,7 +886,8 @@ class LogCounter(object):
                     'QUOTE_VALUES',
                     'SHELL_VAR',
                     'USER_NOT_FOUND',
-                    'HOURS_NOT_MINUTES'))
+                    'HOURS_NOT_MINUTES',
+                    'COMMENT'))
 
   def __init__(self):
     """Inits LogCounter."""
diff --git a/tests/test_crontab.disable b/tests/test_crontab.disable
index 6fac9b1c256ac6808d8e112d8fa6bd485c93648e..9808b331b69ed4312dad82d88be30cdf20873b7d 100644
--- a/tests/test_crontab.disable
+++ b/tests/test_crontab.disable
@@ -24,6 +24,11 @@ OK_EMPTY=""
 BAD_SPACE= 
 OK_SPACE=" "
 
+# disable fail 1 for comment in variable assignment.
+NO_COMMENT="something" # comment
+NO_COMMENT=something # comment
+NO_COMMENT="something # comment"
+
 # disable warn 1 for bad time spec.
 * 3 * * * root Warn for hours not minutes
 # disable fail 1 for bad time spec.
@@ -74,7 +79,7 @@ OK_SPACE=" "
 1,4,6,*/5 */3,2,7 * * mOn-Fri root Good Day Range
 1,4,6,*/5 */3,2,7 * * mOn-Fri/2 root Good Day Range Step
 # chkcrontab: enable-msg=FIELD_VALUE_ERROR
-# FAIL 1 for bad time spec.
+# FAIL 3 for bad time spec.
 1,4,6,*/5 */3,2,7 * * mOn/2 root Bad Day Step
 1,4,6,*/5 */3,2,7 * * mOn-Fri/8 root Good Day Range Step
 # disable warn 1 for probable missing user.