diff --git a/reactos/lib/richedit/reader.c b/reactos/lib/richedit/reader.c
index aaacb89bb6d..cebfb25a305 100644
--- a/reactos/lib/richedit/reader.c
+++ b/reactos/lib/richedit/reader.c
@@ -126,6 +126,7 @@ int _RTFGetChar(RTF_Info *info)
     {
         char buff[10];
         long pcb;
+        memset(buff, '\0', sizeof(buff)); /* Workaround for bug in Nullsoft installer */
         info->editstream.pfnCallback(info->editstream.dwCookie, buff, 1, &pcb);
         if(pcb == 0)
            return EOF;