diff --git a/Sample/Interface/AutocorrelationModels.h b/Sample/Interface/AutocorrelationModels.h
index bdb21d51e29cdaa7b8544df4b1ea11642ce306ca..5d87ae7f39df4fd9975eba559173d222fb9e7365 100644
--- a/Sample/Interface/AutocorrelationModels.h
+++ b/Sample/Interface/AutocorrelationModels.h
@@ -12,8 +12,8 @@
 //
 //  ************************************************************************************************
 
-#ifndef BORNAGAIN_SAMPLE_INTERFACE_AUTOCORRMODELS_H
-#define BORNAGAIN_SAMPLE_INTERFACE_AUTOCORRMODELS_H
+#ifndef BORNAGAIN_SAMPLE_INTERFACE_AUTOCORRELATIONMODELS_H
+#define BORNAGAIN_SAMPLE_INTERFACE_AUTOCORRELATIONMODELS_H
 
 #include "Base/Type/ICloneable.h"
 #include "Param/Node/INode.h"
@@ -95,4 +95,4 @@ private:
     double m_lateral_corr_length; //!< lateral correlation length of the roughness
 };
 
-#endif // BORNAGAIN_SAMPLE_INTERFACE_AUTOCORRMODELS_H
+#endif // BORNAGAIN_SAMPLE_INTERFACE_AUTOCORRELATIONMODELS_H