diff --git a/src/Mod/Import/App/ImportOCAF.cpp b/src/Mod/Import/App/ImportOCAF.cpp
index e7ff053d18..c24c62743c 100644
--- a/src/Mod/Import/App/ImportOCAF.cpp
+++ b/src/Mod/Import/App/ImportOCAF.cpp
@@ -129,7 +129,7 @@ void ImportOCAF::loadShapes()
 
 void ImportOCAF::setMerge(bool merge)
 {
-	this->merge=merge;
+    this->merge=merge;
 }
 
 void ImportOCAF::loadShapes(const TDF_Label& label, const TopLoc_Location& loc,
diff --git a/src/Mod/Import/Gui/AppImportGuiPy.cpp b/src/Mod/Import/Gui/AppImportGuiPy.cpp
index ab16a72b9b..b2f1e894b0 100644
--- a/src/Mod/Import/Gui/AppImportGuiPy.cpp
+++ b/src/Mod/Import/Gui/AppImportGuiPy.cpp
@@ -342,9 +342,9 @@ private:
 
             Handle(XCAFApp_Application) hApp = XCAFApp_Application::GetApplication();
             Handle(TDocStd_Document) hDoc;
-	    bool optionReadShapeCompoundMode_status;
+            bool optionReadShapeCompoundMode_status;
             hApp->NewDocument(TCollection_ExtendedString("MDTV-CAF"), hDoc);
-	    ParameterGrp::handle hGrp = App::GetApplication().GetParameterGroupByPath("User parameter:BaseApp/Preferences/Mod/Import/hSTEP");
+            ParameterGrp::handle hGrp = App::GetApplication().GetParameterGroupByPath("User parameter:BaseApp/Preferences/Mod/Import/hSTEP");
             optionReadShapeCompoundMode_status = hGrp->GetBool("ReadShapeCompoundMode",false);
 
             if (file.hasExtension("stp") || file.hasExtension("step")) {
@@ -419,8 +419,8 @@ private:
             // purge the document before recomputing it to clear it and settle it in the proper
             // way. This is drastically improving STEP rendering time on complex STEP files.
             pcDoc->recompute();
-	    if (file.hasExtension("stp") || file.hasExtension("step"))
-		    ocaf.setMerge(optionReadShapeCompoundMode_status);
+            if (file.hasExtension("stp") || file.hasExtension("step"))
+                ocaf.setMerge(optionReadShapeCompoundMode_status);
             ocaf.loadShapes();
             pcDoc->purgeTouched();
             pcDoc->recompute();
@@ -523,10 +523,10 @@ private:
                 ParameterGrp::handle hGrp_stp = App::GetApplication().GetParameterGroupByPath("User parameter:BaseApp/Preferences/Mod/Import/hSTEP");
                 optionScheme_214 = hGrp_stp->GetBool("Scheme_214",true);
                 optionScheme_203 = hGrp_stp->GetBool("Scheme_203",false);
-		if ( optionScheme_214 )
-		    Interface_Static::SetCVal("write.step.schema", "AP214CD");
-		if ( optionScheme_203 )
-		    Interface_Static::SetCVal("write.step.schema", "AP203");
+                if (optionScheme_214)
+                    Interface_Static::SetCVal("write.step.schema", "AP214CD");
+                if (optionScheme_203)
+                    Interface_Static::SetCVal("write.step.schema", "AP203");
                 STEPCAFControl_Writer writer;
                 writer.Transfer(hDoc, STEPControl_AsIs);