diff --git a/bbcode.go b/bbcode.go
index 0c6a87e..f0c7658 100644
--- a/bbcode.go
+++ b/bbcode.go
@@ -177,7 +177,7 @@ func (this *BBCodeRenderer) displayfmt(s string) string {
 		}
 		epos += spos
 
-		jsonInnerContent, _ := json.Marshal(s[spos : epos-spos])
+		jsonInnerContent, _ := json.Marshal(s[spos:epos])
 
 		ret += `<div class="html"><a href="javascript:;" onclick="` + template.HTMLEscapeString(`els(this, `+string(jsonInnerContent)+`);`) + `">` + this.DynamicContentWarning + `</a></div>`
 		hpos = epos + 7