diff --git a/core/org.eclipse.cdt.core/ChangeLog b/core/org.eclipse.cdt.core/ChangeLog
index 6c1c0c73ffe..a5983376fdc 100644
--- a/core/org.eclipse.cdt.core/ChangeLog
+++ b/core/org.eclipse.cdt.core/ChangeLog
@@ -1,3 +1,8 @@
+2004-0608 Alain Magloire
+
+	Quick workaround for PR 57287.
+	* model/org/eclipse/cdt/core/model/CoreModel.java
+
 2004-06-08 Alain Magloire
 
 	Patch from Dirk Dörr.
diff --git a/core/org.eclipse.cdt.core/model/org/eclipse/cdt/core/model/CoreModel.java b/core/org.eclipse.cdt.core/model/org/eclipse/cdt/core/model/CoreModel.java
index ed66386ea29..89d59f5758f 100644
--- a/core/org.eclipse.cdt.core/model/org/eclipse/cdt/core/model/CoreModel.java
+++ b/core/org.eclipse.cdt.core/model/org/eclipse/cdt/core/model/CoreModel.java
@@ -158,8 +158,11 @@ public class CoreModel {
 	 */
 	public static boolean isTranslationUnit(IFile file) {
 		if (file != null) {
-			ICFileType type = CCorePlugin.getDefault().getFileType(file.getProject(), file.getName());
-			return type.isTranslationUnit();
+			IProject p = file.getProject();
+			if (hasCNature(p) || hasCCNature(p)) {
+				ICFileType type = CCorePlugin.getDefault().getFileType(file.getProject(), file.getName());
+				return type.isTranslationUnit();
+			}
 		}
 		return false;
 	}