diff --git a/build/org.eclipse.cdt.autotools.core/src/org/eclipse/cdt/internal/autotools/core/AutotoolsPropertyConstants.java b/build/org.eclipse.cdt.autotools.core/src/org/eclipse/cdt/internal/autotools/core/AutotoolsPropertyConstants.java
index 2d78a7e4a07..b501c22cf08 100644
--- a/build/org.eclipse.cdt.autotools.core/src/org/eclipse/cdt/internal/autotools/core/AutotoolsPropertyConstants.java
+++ b/build/org.eclipse.cdt.autotools.core/src/org/eclipse/cdt/internal/autotools/core/AutotoolsPropertyConstants.java
@@ -39,11 +39,12 @@ public class AutotoolsPropertyConstants {
 	public static final QualifiedName OPEN_INCLUDE_P = new QualifiedName(PREFIX, "PersistentIncludeResourceMapping"); //$NON-NLS-1$
 	public static final QualifiedName SCANNER_INFO_DIRTY = new QualifiedName(PREFIX, "ScannerInfoDirty"); // $NON-NLSp-1$
 	
-	public static final String[] fACVersions = {"2.13", "2.59", "2.61", "2.68"}; //$NON-NLS-1$
+	public static final String[] fACVersions = { "2.13", "2.59", "2.61", "2.67", "2.68" }; //$NON-NLS-1$
 	public static final String AC_VERSION_2_13 = fACVersions[0];
 	public static final String AC_VERSION_2_59 = fACVersions[1];
 	public static final String AC_VERSION_2_61 = fACVersions[2];
-	public static final String AC_VERSION_2_68 = fACVersions[3];
+	public static final String AC_VERSION_2_67 = fACVersions[3];
+	public static final String AC_VERSION_2_68 = fACVersions[4];
 	public static final String LATEST_AC_VERSION = fACVersions[fACVersions.length - 1];
 	
 	public static final String[] fAMVersions = {"1.4-p6", "1.9.5", "1.9.6", "1.11.1"}; //$NON-NLS-1$
diff --git a/build/org.eclipse.cdt.autotools.ui/src/org/eclipse/cdt/autotools/ui/editors/AcInitElement.java b/build/org.eclipse.cdt.autotools.ui/src/org/eclipse/cdt/autotools/ui/editors/AcInitElement.java
index 6d061cd1ca6..a3e6c755520 100644
--- a/build/org.eclipse.cdt.autotools.ui/src/org/eclipse/cdt/autotools/ui/editors/AcInitElement.java
+++ b/build/org.eclipse.cdt.autotools.ui/src/org/eclipse/cdt/autotools/ui/editors/AcInitElement.java
@@ -37,7 +37,10 @@ public class AcInitElement extends AutoconfMacroElement {
 			if (this.getChildren().length < 2)
 				return;
 			
-			this.validateMultipleArguments();
+			// autoconf 2.67 onwards allows a more relaxed VERSION string format,
+			// so only validate arguments for earlier versions
+			if (VersionComparator.compare(version, AutotoolsPropertyConstants.AC_VERSION_2_67) < 0)
+				this.validateMultipleArguments();
 		}
 
 		return;