diff --git a/CHANGELOG.md b/CHANGELOG.md
index 07364bb5..6ee0df53 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## Unreleased
 
 ### Fixed
+- Fixed `[L|R]PUSHX` variadic arguments normalization (#1633)
 - Fixed wrong `@param` annotation in `Parameters` (#1614)
 - Make `ZRANDMEMBER` prefixable (#1621)
 - Improve connection handshake by pipelining commands (#1622)
diff --git a/src/Command/Redis/LPUSHX.php b/src/Command/Redis/LPUSHX.php
index bbbc6a9d..b8d09764 100644
--- a/src/Command/Redis/LPUSHX.php
+++ b/src/Command/Redis/LPUSHX.php
@@ -27,6 +27,16 @@ class LPUSHX extends RedisCommand
         return 'LPUSHX';
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function setArguments(array $arguments)
+    {
+        $arguments = self::normalizeVariadic($arguments);
+
+        parent::setArguments($arguments);
+    }
+
     public function prefixKeys($prefix)
     {
         $this->applyPrefixForFirstArgument($prefix);
diff --git a/src/Command/Redis/RPUSHX.php b/src/Command/Redis/RPUSHX.php
index aadb92be..ac39bd16 100644
--- a/src/Command/Redis/RPUSHX.php
+++ b/src/Command/Redis/RPUSHX.php
@@ -27,6 +27,16 @@ class RPUSHX extends RedisCommand
         return 'RPUSHX';
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function setArguments(array $arguments)
+    {
+        $arguments = self::normalizeVariadic($arguments);
+
+        parent::setArguments($arguments);
+    }
+
     public function prefixKeys($prefix)
     {
         $this->applyPrefixForFirstArgument($prefix);
diff --git a/tests/Predis/Command/Redis/LPUSHX_Test.php b/tests/Predis/Command/Redis/LPUSHX_Test.php
index 098f63cf..8fccf768 100644
--- a/tests/Predis/Command/Redis/LPUSHX_Test.php
+++ b/tests/Predis/Command/Redis/LPUSHX_Test.php
@@ -50,6 +50,20 @@ class LPUSHX_Test extends PredisCommandTestCase
         $this->assertSame($expected, $command->getArguments());
     }
 
+    /**
+     * @group disconnected
+     */
+    public function testFilterArgumentsValuesAsSingleArray(): void
+    {
+        $arguments = ['key', ['value1', 'value2', 'value3']];
+        $expected = ['key', 'value1', 'value2', 'value3'];
+
+        $command = $this->getCommand();
+        $command->setArguments($arguments);
+
+        $this->assertSame($expected, $command->getArguments());
+    }
+
     /**
      * @group disconnected
      */
diff --git a/tests/Predis/Command/Redis/RPUSHX_Test.php b/tests/Predis/Command/Redis/RPUSHX_Test.php
index 0bfb2dca..d85468eb 100644
--- a/tests/Predis/Command/Redis/RPUSHX_Test.php
+++ b/tests/Predis/Command/Redis/RPUSHX_Test.php
@@ -50,6 +50,20 @@ class RPUSHX_Test extends PredisCommandTestCase
         $this->assertSame($expected, $command->getArguments());
     }
 
+    /**
+     * @group disconnected
+     */
+    public function testFilterArgumentsValuesAsSingleArray(): void
+    {
+        $arguments = ['key', ['value1', 'value2', 'value3']];
+        $expected = ['key', 'value1', 'value2', 'value3'];
+
+        $command = $this->getCommand();
+        $command->setArguments($arguments);
+
+        $this->assertSame($expected, $command->getArguments());
+    }
+
     /**
      * @group disconnected
      */