diff --git a/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/CDescriptor.java b/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/CDescriptor.java
index ee2df412985..a0fa843b6f7 100644
--- a/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/CDescriptor.java
+++ b/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/CDescriptor.java
@@ -541,7 +541,7 @@ public class CDescriptor implements ICDescriptor {
 		for (int i = 0; i < element.length; i++) {
 			if (element[i].getName().equalsIgnoreCase(CEXTENSION_NAME)) {
 				cExtension = (InternalCExtension)element[i].createExecutableExtension("run"); //$NON-NLS-1$
-				cExtension.setExtenionReference(ext);
+				cExtension.setExtensionReference(ext);
 				cExtension.setProject(fProject);
 				break;
 			}
diff --git a/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/InternalCExtension.java b/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/InternalCExtension.java
index a669552582a..f60e31d4256 100644
--- a/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/InternalCExtension.java
+++ b/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/InternalCExtension.java
@@ -23,7 +23,7 @@ public abstract class InternalCExtension extends PlatformObject {
 		fProject = project;
 	}
 
-	void setExtenionReference(ICExtensionReference extReference) {
+	void setExtensionReference(ICExtensionReference extReference) {
 		extensionRef = extReference;
 	}