diff --git a/src/report/report-system/html-document.scm b/src/report/report-system/html-document.scm
index 89239bc2f8..4bfcb89215 100644
--- a/src/report/report-system/html-document.scm
+++ b/src/report/report-system/html-document.scm
@@ -159,7 +159,7 @@
                 ;;./share/gnucash/scm/gnucash/report/balsheet-eg.eguile.scm:<html>
 
                 ;; Validate against HTML4 Transitional:
-                (push "<!DOCTYPE!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN\" \n\"http://www.w3.org/TR/html4/loose.dtd\">")
+                (push "<!DOCTYPE!DOCTYPE html PUBLIC -//W3C//DTD HTML 4.01 Transitional//EN\" \n\"http://www.w3.org/TR/html4/loose.dtd\">")
                 (push "<head>\n")
                 (push "<meta http-equiv=\"content-type\" content=\"text/html; charset=utf-8\" />\n")
 				(if css? 
