diff --git a/build/org.eclipse.cdt.managedbuilder.core/plugin.xml b/build/org.eclipse.cdt.managedbuilder.core/plugin.xml
index 5c198d3ad4f..68dbb80a0fe 100644
--- a/build/org.eclipse.cdt.managedbuilder.core/plugin.xml
+++ b/build/org.eclipse.cdt.managedbuilder.core/plugin.xml
@@ -609,7 +609,7 @@
             class="org.eclipse.cdt.managedbuilder.language.settings.providers.GCCBuiltinSpecsDetector"
             id="org.eclipse.cdt.managedbuilder.core.GCCBuiltinSpecsDetector"
             name="%GCCBuildinCompilerSettings.name"
-            parameter="${COMMAND} -E -P -v -dD ${INPUTS}">
+            parameter="${COMMAND} -E -P -v -dD "${INPUTS}"">
          <language-scope id="org.eclipse.cdt.core.gcc"/>
          <language-scope id="org.eclipse.cdt.core.g++"/>
       </provider>
@@ -617,7 +617,7 @@
             class="org.eclipse.cdt.managedbuilder.internal.language.settings.providers.GCCBuiltinSpecsDetectorCygwin"
             id="org.eclipse.cdt.managedbuilder.core.GCCBuiltinSpecsDetectorCygwin"
             name="CDT GCC Builtin Compiler Settings Cygwin"
-            parameter="${COMMAND} -E -P -v -dD ${INPUTS}">
+            parameter="${COMMAND} -E -P -v -dD &quot;${INPUTS}&quot;">
          <language-scope id="org.eclipse.cdt.core.gcc"/>
          <language-scope id="org.eclipse.cdt.core.g++"/>
       </provider>
@@ -625,7 +625,7 @@
             class="org.eclipse.cdt.managedbuilder.internal.language.settings.providers.GCCBuiltinSpecsDetectorMinGW"
             id="org.eclipse.cdt.managedbuilder.core.GCCBuiltinSpecsDetectorMinGW"
             name="%GCCBuildinCompilerSettingsMinGW.name"
-            parameter="${COMMAND} -E -P -v -dD ${INPUTS}">
+            parameter="${COMMAND} -E -P -v -dD &quot;${INPUTS}&quot;">
          <language-scope id="org.eclipse.cdt.core.gcc"/>
          <language-scope id="org.eclipse.cdt.core.g++"/>
       </provider>
diff --git a/xlc/org.eclipse.cdt.managedbuilder.xlc.core/plugin.xml b/xlc/org.eclipse.cdt.managedbuilder.xlc.core/plugin.xml
index dafa1c27d85..49687e9de19 100644
--- a/xlc/org.eclipse.cdt.managedbuilder.xlc.core/plugin.xml
+++ b/xlc/org.eclipse.cdt.managedbuilder.xlc.core/plugin.xml
@@ -82,7 +82,7 @@
             class="org.eclipse.cdt.managedbuilder.xlc.core.XlcBuiltinSpecsDetector"
             id="org.eclipse.cdt.managedbuilder.xlc.core.XlcBuiltinSpecsDetector"
             name="%XlcBuiltinSpecsDetectorName"
-            parameter="${COMMAND} -E -V -P -w ${INPUTS}">
+            parameter="${COMMAND} -E -V -P -w &quot;${INPUTS}&quot;">
          <language-scope id="org.eclipse.cdt.core.gcc"/>
          <language-scope id="org.eclipse.cdt.core.g++"/>
       </provider>