diff --git a/tools/wine.inf b/tools/wine.inf
index 2676f161518..c311cd9bed4 100644
--- a/tools/wine.inf
+++ b/tools/wine.inf
@@ -87,6 +87,7 @@ Services="System\CurrentControlSet\Services"
 
 [Classes]
 HKCR,.avi,"Content Type",2,"video/avi"
+HKCR,.chm,,2,"chm.file"
 HKCR,.dll,"Content Type",2,"application/x-msdownload"
 HKCR,.exe,,2,"exefile"
 HKCR,.exe,"Content Type",2,"application/x-msdownload"
@@ -108,6 +109,7 @@ HKCR,.wri,,2,"wrifile"
 HKCR,.wav,"Content Type",2,"audio/wav"
 HKCR,.xml,"Content Type",2,"text/xml"
 HKCR,.xsl,"Content Type",2,"text/xsl"
+HKCR,chm.file\shell\open\command,,2,"%11%\hh.exe %1"
 HKCR,exefile\DefaultIcon,,2,"%1"
 HKCR,exefile\shell\open\command,,2,"""%1"" %*"
 HKCR,folder\shell\open\ddeexec,,2,"[ViewFolder("%l", %I, %S)]"