diff --git a/clibrary.c b/clibrary.c
index 320da3c..8988fd5 100644
--- a/clibrary.c
+++ b/clibrary.c
@@ -239,6 +239,7 @@ void GenericPrintf(struct ParseState *Parser, struct Value *ReturnValue, struct
         if (*FPos == '%')
         {
             FPos++;
+	    FieldWidth = 0;
             if (*FPos == '-')
             {
                 /* a leading '-' means left justify */