diff --git a/org.eclipse.titan.designer/src/org/eclipse/titan/designer/editors/Stylers.java b/org.eclipse.titan.designer/src/org/eclipse/titan/designer/editors/Stylers.java
index 66d1422f780ac370d94d3bad24ad69a1a8c22df4..c99989b8be6997426aa6cb3bc6308cf2cb84c1c6 100755
--- a/org.eclipse.titan.designer/src/org/eclipse/titan/designer/editors/Stylers.java
+++ b/org.eclipse.titan.designer/src/org/eclipse/titan/designer/editors/Stylers.java
@@ -73,6 +73,16 @@ public class Stylers {
 		}
 	}
 	
+	public static class StrikethroughStyler extends Styler {
+		@Override
+		public void applyStyles(TextStyle textStyle) {
+			FontData fontData = JFaceResources.getDefaultFont().getFontData()[0];
+			Font f = new Font(Display.getDefault(), fontData);
+			textStyle.font = f;
+			textStyle.strikeout = true;
+		}
+	}
+	
 	public static class ColoredStyler extends Styler {
 		private final Color color;
 		private int style;
diff --git a/org.eclipse.titan.designer/src/org/eclipse/titan/designer/editors/ttcn3editor/OutlineStyledLabelProvider.java b/org.eclipse.titan.designer/src/org/eclipse/titan/designer/editors/ttcn3editor/OutlineStyledLabelProvider.java
index d68ff267c8e22206a55695aaa90394709c328da9..8fa3a26391f3a16793ffbc2262fa2d80106a76ab 100755
--- a/org.eclipse.titan.designer/src/org/eclipse/titan/designer/editors/ttcn3editor/OutlineStyledLabelProvider.java
+++ b/org.eclipse.titan.designer/src/org/eclipse/titan/designer/editors/ttcn3editor/OutlineStyledLabelProvider.java
@@ -123,8 +123,12 @@ public final class OutlineStyledLabelProvider extends DelegatingStyledCellLabelP
 			
 			private StyledString getStyledText(Object element, String text) {
 				final StyledString styledOutline = new StyledString();
+				boolean isDeprecated = false;
 				if (element instanceof Definition) {
 					final Definition elemDef = (Definition)element;
+					if (elemDef.hasDocumentComment() && elemDef.getDocumentComment().isDeprecated()) {
+						isDeprecated = true;
+					}
 					if (isInClassBody(elemDef.getMyScope())) {
 						Stylers.ColoredStyler styler = null;
 						switch (elemDef.getVisibilityModifier()) {
@@ -142,7 +146,11 @@ public final class OutlineStyledLabelProvider extends DelegatingStyledCellLabelP
 					} 
 				} 
 				if (styledOutline.length() == 0) {
-					styledOutline.append(text);
+					if (isDeprecated) {
+						styledOutline.append(text, new Stylers.StrikethroughStyler());
+					} else {
+						styledOutline.append(text);
+					}
 				}
 				return styledOutline;			
 			}