diff --git a/PowerEditor/src/ScitillaComponent/FindReplaceDlg.cpp b/PowerEditor/src/ScitillaComponent/FindReplaceDlg.cpp
index 1279b3fa..cf9fdb4b 100644
--- a/PowerEditor/src/ScitillaComponent/FindReplaceDlg.cpp
+++ b/PowerEditor/src/ScitillaComponent/FindReplaceDlg.cpp
@@ -2505,13 +2505,13 @@ void Finder::openAll()
 	}
 }
 
-bool Finder::isLineActualSearchResult(int line)
+bool Finder::isLineActualSearchResult(int line) const
 {
 	const int foldLevel = _scintView.execute(SCI_GETFOLDLEVEL, line) & SC_FOLDLEVELNUMBERMASK;
 	return foldLevel == SC_FOLDLEVELBASE + 3;
 }
 
-generic_string Finder::prepareStringForClipboard(generic_string s)
+generic_string Finder::prepareStringForClipboard(generic_string s) const
 {
 	// Input: a string like "\tLine 3: search result".
 	// Output: "search result"
diff --git a/PowerEditor/src/ScitillaComponent/FindReplaceDlg.h b/PowerEditor/src/ScitillaComponent/FindReplaceDlg.h
index 280afc29..52a436c0 100644
--- a/PowerEditor/src/ScitillaComponent/FindReplaceDlg.h
+++ b/PowerEditor/src/ScitillaComponent/FindReplaceDlg.h
@@ -178,8 +178,8 @@ private:
 		_scintView.execute(SCI_SETREADONLY, isReadOnly);
 	};
 
-	bool isLineActualSearchResult(int line);
-	generic_string prepareStringForClipboard(generic_string s);
+	bool isLineActualSearchResult(int line) const;
+	generic_string prepareStringForClipboard(generic_string s) const;
 
 	static FoundInfo EmptyFoundInfo;
 	static SearchResultMarking EmptySearchResultMarking;