diff --git a/tests/rules/test_missing_space_before_subcommand.py b/tests/rules/test_missing_space_before_subcommand.py
index 7455b9e..53b6009 100644
--- a/tests/rules/test_missing_space_before_subcommand.py
+++ b/tests/rules/test_missing_space_before_subcommand.py
@@ -8,11 +8,11 @@ from thefuck.types import Command
 def all_executables(mocker):
     return mocker.patch(
         'thefuck.rules.missing_space_before_subcommand.get_all_executables',
-        return_value=['git', 'ls', 'npm'])
+        return_value=['git', 'ls', 'npm', 'w', 'watch'])
 
 
 @pytest.mark.parametrize('script', [
-    'gitbranch', 'ls-la', 'npminstall'])
+    'gitbranch', 'ls-la', 'npminstall', 'watchls'])
 def test_match(script):
     assert match(Command(script, ''))
 
@@ -25,6 +25,7 @@ def test_not_match(script):
 @pytest.mark.parametrize('script, result', [
     ('gitbranch', 'git branch'),
     ('ls-la', 'ls -la'),
-    ('npminstall webpack', 'npm install webpack')])
+    ('npminstall webpack', 'npm install webpack'),
+    ('watchls', 'watch ls')])
 def test_get_new_command(script, result):
     assert get_new_command(Command(script, '')) == result
diff --git a/thefuck/rules/missing_space_before_subcommand.py b/thefuck/rules/missing_space_before_subcommand.py
index 410cb4b..fd4fbd7 100644
--- a/thefuck/rules/missing_space_before_subcommand.py
+++ b/thefuck/rules/missing_space_before_subcommand.py
@@ -4,7 +4,7 @@ from thefuck.utils import get_all_executables, memoize
 @memoize
 def _get_executable(script_part):
     for executable in get_all_executables():
-        if script_part.startswith(executable):
+        if len(executable) > 1 and script_part.startswith(executable):
             return executable