diff --git a/src/Composer/DependencyResolver/DefaultPolicy.php b/src/Composer/DependencyResolver/DefaultPolicy.php
index 684f11851..5c94c4680 100644
--- a/src/Composer/DependencyResolver/DefaultPolicy.php
+++ b/src/Composer/DependencyResolver/DefaultPolicy.php
@@ -67,6 +67,8 @@ class DefaultPolicy implements PolicyInterface
      */
     public function selectPreferedPackages(Pool $pool, array $installedMap, array $literals, $requiredPackage = null)
     {
+        trigger_error('Method selectPreferedPackages is deprecated and replaced by selectPreferredPackages, please update your usage', E_USER_DEPRECATED);
+
         return $this->selectPreferredPackages($pool, $installedMap, $literals, $requiredPackage);
     }
 
diff --git a/src/Composer/Package/LinkConstraint/EmptyConstraint.php b/src/Composer/Package/LinkConstraint/EmptyConstraint.php
index 09eb15ada..33f9e2e82 100644
--- a/src/Composer/Package/LinkConstraint/EmptyConstraint.php
+++ b/src/Composer/Package/LinkConstraint/EmptyConstraint.php
@@ -14,7 +14,7 @@ namespace Composer\Package\LinkConstraint;
 
 use Composer\Semver\Constraint\EmptyConstraint as SemverEmptyConstraint;
 
-@trigger_error('The ' . __NAMESPACE__ . '\EmptyConstraint class is deprecated, use Composer\Semver\Constraint\EmptyConstraint instead.', E_USER_DEPRECATED);
+trigger_error('The ' . __NAMESPACE__ . '\EmptyConstraint class is deprecated, use Composer\Semver\Constraint\EmptyConstraint instead.', E_USER_DEPRECATED);
 
 /**
  * @deprecated use Composer\Semver\Constraint\EmptyConstraint instead
diff --git a/src/Composer/Package/LinkConstraint/LinkConstraintInterface.php b/src/Composer/Package/LinkConstraint/LinkConstraintInterface.php
index bac98c6f9..b8903ea8f 100644
--- a/src/Composer/Package/LinkConstraint/LinkConstraintInterface.php
+++ b/src/Composer/Package/LinkConstraint/LinkConstraintInterface.php
@@ -14,7 +14,7 @@ namespace Composer\Package\LinkConstraint;
 
 use Composer\Semver\Constraint\ConstraintInterface;
 
-@trigger_error('The ' . __NAMESPACE__ . '\LinkConstraintInterface interface is deprecated, use Composer\Semver\Constraint\ConstraintInterface instead.', E_USER_DEPRECATED);
+trigger_error('The ' . __NAMESPACE__ . '\LinkConstraintInterface interface is deprecated, use Composer\Semver\Constraint\ConstraintInterface instead.', E_USER_DEPRECATED);
 
 /**
  * @deprecated use Composer\Semver\Constraint\ConstraintInterface instead
diff --git a/src/Composer/Package/LinkConstraint/MultiConstraint.php b/src/Composer/Package/LinkConstraint/MultiConstraint.php
index 6e091a430..10a996568 100644
--- a/src/Composer/Package/LinkConstraint/MultiConstraint.php
+++ b/src/Composer/Package/LinkConstraint/MultiConstraint.php
@@ -14,7 +14,7 @@ namespace Composer\Package\LinkConstraint;
 
 use Composer\Semver\Constraint\MultiConstraint as SemverMultiConstraint;
 
-@trigger_error('The ' . __NAMESPACE__ . '\MultiConstraint class is deprecated, use Composer\Semver\Constraint\MultiConstraint instead.', E_USER_DEPRECATED);
+trigger_error('The ' . __NAMESPACE__ . '\MultiConstraint class is deprecated, use Composer\Semver\Constraint\MultiConstraint instead.', E_USER_DEPRECATED);
 
 /**
  * @deprecated use Composer\Semver\Constraint\MultiConstraint instead
diff --git a/src/Composer/Package/LinkConstraint/SpecificConstraint.php b/src/Composer/Package/LinkConstraint/SpecificConstraint.php
index 880873887..899b5b38a 100644
--- a/src/Composer/Package/LinkConstraint/SpecificConstraint.php
+++ b/src/Composer/Package/LinkConstraint/SpecificConstraint.php
@@ -14,7 +14,7 @@ namespace Composer\Package\LinkConstraint;
 
 use Composer\Semver\Constraint\AbstractConstraint;
 
-@trigger_error('The ' . __NAMESPACE__ . '\SpecificConstraint abstract class is deprecated, use Composer\Semver\Constraint\AbstractConstraint instead.', E_USER_DEPRECATED);
+trigger_error('The ' . __NAMESPACE__ . '\SpecificConstraint abstract class is deprecated, use Composer\Semver\Constraint\AbstractConstraint instead.', E_USER_DEPRECATED);
 
 /**
  * @deprecated use Composer\Semver\Constraint\AbstractConstraint instead
diff --git a/src/Composer/Package/LinkConstraint/VersionConstraint.php b/src/Composer/Package/LinkConstraint/VersionConstraint.php
index 580016795..d6b1cbe1d 100644
--- a/src/Composer/Package/LinkConstraint/VersionConstraint.php
+++ b/src/Composer/Package/LinkConstraint/VersionConstraint.php
@@ -14,7 +14,7 @@ namespace Composer\Package\LinkConstraint;
 
 use Composer\Semver\Constraint\Constraint;
 
-@trigger_error('The ' . __NAMESPACE__ . '\VersionConstraint class is deprecated, use Composer\Semver\Constraint\Constraint instead.', E_USER_DEPRECATED);
+trigger_error('The ' . __NAMESPACE__ . '\VersionConstraint class is deprecated, use Composer\Semver\Constraint\Constraint instead.', E_USER_DEPRECATED);
 
 /**
  * @deprecated use Composer\Semver\Constraint\Constraint instead
diff --git a/src/Composer/Util/SpdxLicense.php b/src/Composer/Util/SpdxLicense.php
index 8934de679..be4efdc54 100644
--- a/src/Composer/Util/SpdxLicense.php
+++ b/src/Composer/Util/SpdxLicense.php
@@ -14,7 +14,7 @@ namespace Composer\Util;
 
 use Composer\Spdx\SpdxLicenses;
 
-@trigger_error('The ' . __NAMESPACE__ . '\SpdxLicense class is deprecated, use Composer\Spdx\SpdxLicenses instead.', E_USER_DEPRECATED);
+trigger_error('The ' . __NAMESPACE__ . '\SpdxLicense class is deprecated, use Composer\Spdx\SpdxLicenses instead.', E_USER_DEPRECATED);
 
 /**
  * @deprecated use Composer\Spdx\SpdxLicenses instead