diff --git a/aegisub/src/ass_dialogue.cpp b/aegisub/src/ass_dialogue.cpp
index ff504bd17..3a5e57efe 100644
--- a/aegisub/src/ass_dialogue.cpp
+++ b/aegisub/src/ass_dialogue.cpp
@@ -771,7 +771,7 @@ bool AssDialogue::CollidesWith(AssDialogue *target) {
 
 ////////////////////////
 // Return just the text without any overrides
-wxString AssDialogue::GetStrippedText() {
+wxString AssDialogue::GetStrippedText() const {
 	wxString justtext = wxString(_T(""));
 	bool inCode = false;
 	
diff --git a/aegisub/src/ass_dialogue.h b/aegisub/src/ass_dialogue.h
index 805abcb35..f43feb7db 100644
--- a/aegisub/src/ass_dialogue.h
+++ b/aegisub/src/ass_dialogue.h
@@ -177,7 +177,7 @@ public:
 	void ConvertTagsToSRT();		// Converts tags to SRT format
 	void StripTags();				// Strips all tags from the text
 	void StripTag(wxString tagName);// Strips a specific tag from the text
-	wxString GetStrippedText();		// Gets text without tags
+	wxString GetStrippedText() const; // Gets text without tags
 
 	void UpdateData();				// Updates raw data from current values + text
 	void UpdateText();				// Generates text from the override tags