diff --git a/aegisub/src/ass_dialogue.cpp b/aegisub/src/ass_dialogue.cpp
index ae6187101..ff504bd17 100644
--- a/aegisub/src/ass_dialogue.cpp
+++ b/aegisub/src/ass_dialogue.cpp
@@ -671,6 +671,16 @@ void AssDialogue::ConvertTagsToSRT () {
 		}
 	}
 
+	// Ensure all tags are closed
+	if (isBold)
+		final += _T("</b>");
+	if (isItalic)
+		final += _T("</i>");
+	if (isUnder)
+		final += _T("</u>");
+	if (isStrike)
+		final += _T("</s>");
+
 	Text = final;
 	UpdateData();
 	ClearBlocks();
diff --git a/aegisub/src/subtitle_format_srt.cpp b/aegisub/src/subtitle_format_srt.cpp
index db3328fec..5c96369db 100644
--- a/aegisub/src/subtitle_format_srt.cpp
+++ b/aegisub/src/subtitle_format_srt.cpp
@@ -184,9 +184,15 @@ void SRTSubtitleFormat::WriteFile(wxString _filename,wxString encoding) {
 	CreateCopy();
 	SortLines();
 	StripComments();
+	// Tags must be converted in two passes
+	// First ASS style overrides are converted to SRT but linebreaks are kept
+	ConvertTags(2,_T("\\N"));
+	// Then we can recombine overlaps, this requires ASS style linebreaks
 	RecombineOverlaps();
 	MergeIdentical();
-	ConvertTags(2,_T("\r\n"));
+	// And finally convert linebreaks
+	ConvertTags(0,_T("\r\n"));
+	// Otherwise unclosed overrides might affect lines they shouldn't, see bug #809 for example
 
 	// Write lines
 	int i=1;