diff --git a/phpseclib/Crypt/EC/Formats/Signature/IEEE.php b/phpseclib/Crypt/EC/Formats/Signature/IEEE.php
index cb98daa7..e300b6c1 100644
--- a/phpseclib/Crypt/EC/Formats/Signature/IEEE.php
+++ b/phpseclib/Crypt/EC/Formats/Signature/IEEE.php
@@ -54,11 +54,11 @@ abstract class IEEE
     /**
      * Returns a signature in the appropriate format
      */
-    public static function save(BigInteger $r, BigInteger $s): string
+    public static function save(BigInteger $r, BigInteger $s, string $curve, int $length): string
     {
         $r = $r->toBytes();
         $s = $s->toBytes();
-        $len = max(strlen($r), strlen($s));
-        return str_pad($r, $len, "\0", STR_PAD_LEFT) . str_pad($s, $len, "\0", STR_PAD_LEFT);
+        $length >>= 3;
+        return str_pad($r, $length, "\0", STR_PAD_LEFT) . str_pad($s, $length, "\0", STR_PAD_LEFT);
     }
 }
diff --git a/phpseclib/Crypt/EC/PrivateKey.php b/phpseclib/Crypt/EC/PrivateKey.php
index 513983cb..0382eb6d 100644
--- a/phpseclib/Crypt/EC/PrivateKey.php
+++ b/phpseclib/Crypt/EC/PrivateKey.php
@@ -158,7 +158,7 @@ final class PrivateKey extends EC implements Common\PrivateKey
 
                 extract(ASN1Signature::load($signature));
 
-                return $shortFormat == 'SSH2' ? $format::save($r, $s, $this->getCurve()) : $format::save($r, $s);
+                return $this->formatSignature($r, $s);
             }
         }
 
@@ -207,7 +207,7 @@ final class PrivateKey extends EC implements Common\PrivateKey
         list(, $s) = $temp->divide($this->q);
         */
 
-        return $shortFormat == 'SSH2' ? $format::save($r, $s, $this->getCurve()) : $format::save($r, $s);
+        return $this->formatSignature($r, $s);
     }
 
     /**
@@ -249,4 +249,28 @@ final class PrivateKey extends EC implements Common\PrivateKey
         }
         return $key;
     }
+
+    /**
+     * Returns a signature in the appropriate format
+     *
+     * @return string
+     */
+    private function formatSignature(BigInteger $r, BigInteger $s): string
+    {
+        $format = $this->sigFormat;
+
+        $temp = new \ReflectionMethod($format, 'save');
+        $paramCount = $temp->getNumberOfRequiredParameters();
+
+        // @codingStandardsIgnoreStart
+        switch ($paramCount) {
+            case 2: return $format::save($r, $s);
+            case 3: return $format::save($r, $s, $this->getCurve());
+            case 4: return $format::save($r, $s, $this->getCurve(), $this->getLength());
+        }
+        // @codingStandardsIgnoreEnd
+
+        // presumably the only way you could get to this is if you were using a custom plugin
+        throw new UnsupportedOperationException("$format::save() has $paramCount parameters - the only valid parameter counts are 2 or 3");
+    }
 }
diff --git a/tests/Unit/Crypt/EC/KeyTest.php b/tests/Unit/Crypt/EC/KeyTest.php
index e6534986..0f84446e 100644
--- a/tests/Unit/Crypt/EC/KeyTest.php
+++ b/tests/Unit/Crypt/EC/KeyTest.php
@@ -749,4 +749,18 @@ z9DYTLdGkQDqox3AtEs9nn6kE1O/vHE4bqMegjj4gbA=
         $key = EC::loadFormat('PKCS8', $key);
         $this->assertInstanceOf(PublicKey::class, $key);
     }
+
+    public function testIEEESignatureCreate(): void
+    {
+        $key = PublicKeyLoader::load('-----BEGIN PRIVATE KEY-----
+MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQg7+qVCtyt+tV2hTou
+kbZNIHu+PaE0osExnxdlkiC+VYqhRANCAAS8yEueJvIAnCk++0rsD8X9dk3hAmyb
+4lv6WkjCQU5iksxIG/E60L8IeDZX8+oNzHPjNN5/6MBk0ISrGKyFhlH1
+-----END PRIVATE KEY-----');
+
+        $priv = $key->withSignatureFormat('IEEE');
+        $sig = $priv->sign('ddd');
+
+        $this->assertTrue($key->getPublicKey()->withSignatureFormat('IEEE')->verify('ddd', $sig));
+    }
 }