diff --git a/src/Builder/BuilderAbstract.php b/src/Builder/BuilderAbstract.php
index 9f47803..6ff202d 100644
--- a/src/Builder/BuilderAbstract.php
+++ b/src/Builder/BuilderAbstract.php
@@ -4,6 +4,30 @@
 
 abstract class BuilderAbstract implements BuilderInterface
 {
+    /**
+     * The command's name.
+     *
+     * @var string
+     */
+    protected $command;
+
+    /**
+     * Constructor. Offers an opportunity to set a command's alias/path.
+     *
+     * @throws InvalidArgumentException If the argument isn't a string.
+     */
+    public function __construct()
+    {
+        $args = func_get_args();
+        if (!empty($args)) {
+            if (is_string($args[0])) {
+                $this->command = $args[0];
+            } else {
+                throw new InvalidArgumentException('This constructor expects a string argument.');
+            }
+        }
+    }
+
     /**
      * Build the command string to be executed.
      *
diff --git a/src/Builder/GrowlNotifyBuilder.php b/src/Builder/GrowlNotifyBuilder.php
index 62fcb57..107c004 100644
--- a/src/Builder/GrowlNotifyBuilder.php
+++ b/src/Builder/GrowlNotifyBuilder.php
@@ -11,23 +11,6 @@ class GrowlNotifyBuilder extends BuilderAbstract
      */
     protected $command = 'growlnotify';
 
-    /**
-     * Constructor. Offers an opportunity to set a command's alias.
-     *
-     * @throws InvalidArgumentException If the argument isn't a string.
-     */
-    public function __construct()
-    {
-        $args = func_get_args();
-        if (!empty($args)) {
-            if (is_string($args[0])) {
-                $this->command = $args[0];
-            } else {
-                throw new InvalidArgumentException('This constructor expects a string argument.');
-            }
-        }
-    }
-
     /**
      * Builds the growlnotify command to be executed.
      *
diff --git a/src/Builder/GrowlNotifyWindowsBuilder.php b/src/Builder/GrowlNotifyWindowsBuilder.php
index 54e5fed..fc71636 100644
--- a/src/Builder/GrowlNotifyWindowsBuilder.php
+++ b/src/Builder/GrowlNotifyWindowsBuilder.php
@@ -11,23 +11,6 @@ class GrowlNotifyWindowsBuilder extends BuilderAbstract
      */
     protected $command = 'growlnotify';
 
-    /**
-     * Constructor. Offers an opportunity to set a command's alias.
-     *
-     * @throws InvalidArgumentException If the argument isn't a string.
-     */
-    public function __construct()
-    {
-        $args = func_get_args();
-        if (!empty($args)) {
-            if (is_string($args[0])) {
-                $this->command = $args[0];
-            } else {
-                throw new InvalidArgumentException('This constructor expects a string argument.');
-            }
-        }
-    }
-
     /**
      * Builds the growlnotify command to be executed.
      *
diff --git a/src/Builder/NotifySendBuilder.php b/src/Builder/NotifySendBuilder.php
index 5f70e73..08a42fa 100644
--- a/src/Builder/NotifySendBuilder.php
+++ b/src/Builder/NotifySendBuilder.php
@@ -11,23 +11,6 @@ class NotifySendBuilder extends BuilderAbstract
      */
     protected $command = 'notify-send';
 
-    /**
-     * Constructor. Offers an opportunity to set a command's alias.
-     *
-     * @throws InvalidArgumentException If the argument isn't a string.
-     */
-    public function __construct()
-    {
-        $args = func_get_args();
-        if (!empty($args)) {
-            if (is_string($args[0])) {
-                $this->command = $args[0];
-            } else {
-                throw new InvalidArgumentException('This constructor expects a string argument.');
-            }
-        }
-    }
-
     /**
      * Builds the notify-send command to be executed.
      *
diff --git a/src/Builder/TerminalNotifierBuilder.php b/src/Builder/TerminalNotifierBuilder.php
index c116681..e667c0f 100644
--- a/src/Builder/TerminalNotifierBuilder.php
+++ b/src/Builder/TerminalNotifierBuilder.php
@@ -11,23 +11,6 @@ class TerminalNotifierBuilder extends BuilderAbstract
      */
     protected $command = 'terminal-notifier';
 
-    /**
-     * Constructor. Offers an opportunity to set a command's alias.
-     *
-     * @throws InvalidArgumentException If the argument isn't a string.
-     */
-    public function __construct()
-    {
-        $args = func_get_args();
-        if (!empty($args)) {
-            if (is_string($args[0])) {
-                $this->command = $args[0];
-            } else {
-                throw new InvalidArgumentException('This constructor expects a string argument.');
-            }
-        }
-    }
-
     /**
      * Builds the terminal-notifier command to be executed.
      *