diff --git a/core/org.eclipse.cdt.core/schema/PDOMASTProcessor.exsd b/core/org.eclipse.cdt.core/schema/PDOMASTProcessor.exsd
index fb087747692..77c88a53cca 100644
--- a/core/org.eclipse.cdt.core/schema/PDOMASTProcessor.exsd
+++ b/core/org.eclipse.cdt.core/schema/PDOMASTProcessor.exsd
@@ -1,6 +1,8 @@
 <?xml version='1.0' encoding='UTF-8'?>
 <!-- Schema file written by PDE -->
 <schema targetNamespace="org.eclipse.cdt.core" xmlns="http://www.w3.org/2001/XMLSchema">
+<include schemaLocation="schema://org.eclipse.core.expressions/schema/expressionLanguage.exsd"/>
+
 <annotation>
       <appInfo>
          <meta.schema plugin="org.eclipse.cdt.core" id="PDOMASTProcessor" name="PDOM AST Processor"/>
diff --git a/core/org.eclipse.cdt.core/schema/ProblemMarkerFilter.exsd b/core/org.eclipse.cdt.core/schema/ProblemMarkerFilter.exsd
index 3a575f9f9e7..2a6daa7bf82 100644
--- a/core/org.eclipse.cdt.core/schema/ProblemMarkerFilter.exsd
+++ b/core/org.eclipse.cdt.core/schema/ProblemMarkerFilter.exsd
@@ -1,6 +1,8 @@
 <?xml version='1.0' encoding='UTF-8'?>
 <!-- Schema file written by PDE -->
 <schema targetNamespace="org.eclipse.cdt.core" xmlns="http://www.w3.org/2001/XMLSchema">
+<include schemaLocation="schema://org.eclipse.core.expressions/schema/expressionLanguage.exsd"/>
+
 <annotation>
       <appInfo>
          <meta.schema plugin="org.eclipse.cdt.core" id="ProblemMarkerFilter" name="Problem Marker Filter"/>
diff --git a/core/org.eclipse.cdt.ui/schema/quickAssistProcessors.exsd b/core/org.eclipse.cdt.ui/schema/quickAssistProcessors.exsd
index 7e6c1b7afc9..c703c003627 100644
--- a/core/org.eclipse.cdt.ui/schema/quickAssistProcessors.exsd
+++ b/core/org.eclipse.cdt.ui/schema/quickAssistProcessors.exsd
@@ -1,6 +1,8 @@
 <?xml version='1.0' encoding='UTF-8'?>
 <!-- Schema file written by PDE -->
 <schema targetNamespace="org.eclipse.cdt.ui" xmlns="http://www.w3.org/2001/XMLSchema">
+<include schemaLocation="schema://org.eclipse.core.expressions/schema/expressionLanguage.exsd"/>
+
 <annotation>
       <appInfo>
          <meta.schema plugin="org.eclipse.cdt.ui" id="quickAssistProcessors" name="Quick Assist Processor"/>
diff --git a/core/org.eclipse.cdt.ui/schema/quickFixProcessors.exsd b/core/org.eclipse.cdt.ui/schema/quickFixProcessors.exsd
index 2aff5d892b5..377cd056857 100644
--- a/core/org.eclipse.cdt.ui/schema/quickFixProcessors.exsd
+++ b/core/org.eclipse.cdt.ui/schema/quickFixProcessors.exsd
@@ -1,6 +1,8 @@
 <?xml version='1.0' encoding='UTF-8'?>
 <!-- Schema file written by PDE -->
 <schema targetNamespace="org.eclipse.cdt.ui" xmlns="http://www.w3.org/2001/XMLSchema">
+<include schemaLocation="schema://org.eclipse.core.expressions/schema/expressionLanguage.exsd"/>
+
 <annotation>
       <appInfo>
          <meta.schema plugin="org.eclipse.cdt.ui" id="quickFixProcessors" name="Quick Fix Processor"/>
diff --git a/core/org.eclipse.cdt.ui/schema/semanticHighlighting.exsd b/core/org.eclipse.cdt.ui/schema/semanticHighlighting.exsd
index f97968ede34..be34da11f00 100644
--- a/core/org.eclipse.cdt.ui/schema/semanticHighlighting.exsd
+++ b/core/org.eclipse.cdt.ui/schema/semanticHighlighting.exsd
@@ -1,6 +1,8 @@
 <?xml version='1.0' encoding='UTF-8'?>
 <!-- Schema file written by PDE -->
 <schema targetNamespace="org.eclipse.cdt.ui" xmlns="http://www.w3.org/2001/XMLSchema">
+<include schemaLocation="schema://org.eclipse.core.expressions/schema/expressionLanguage.exsd"/>
+
 <annotation>
       <appInfo>
          <meta.schema plugin="org.eclipse.cdt.ui" id="semanticHighligher" name="Semantic Highlighting"/>
diff --git a/qt/org.eclipse.cdt.qt.core/schema/qmakeEnvProvider.exsd b/qt/org.eclipse.cdt.qt.core/schema/qmakeEnvProvider.exsd
index 2c6dfad437b..2548edb64f8 100644
--- a/qt/org.eclipse.cdt.qt.core/schema/qmakeEnvProvider.exsd
+++ b/qt/org.eclipse.cdt.qt.core/schema/qmakeEnvProvider.exsd
@@ -1,6 +1,8 @@
 <?xml version='1.0' encoding='UTF-8'?>
 <!-- Schema file written by PDE -->
 <schema targetNamespace="org.eclipse.cdt.qt.core" xmlns="http://www.w3.org/2001/XMLSchema">
+<include schemaLocation="schema://org.eclipse.core.expressions/schema/expressionLanguage.exsd"/>
+
 <annotation>
       <appinfo>
          <meta.schema plugin="org.eclipse.cdt.qt.core" id="qmakeEnvProvider" name="QMake Environment Provider"/>