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diff --git a/reference/C/CONTRIB/SNIP/rmtrail.c b/reference/C/CONTRIB/SNIP/rmtrail.c
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+/*
+** Originally published as part of the MicroFirm Function Library
+**
+** Copyright 1986, S.E. Margison
+** Copyright 1989, Robert B.Stout
+**
+** Subset version released to the public domain, 1991
+**
+** remove trailing whitespace from a string
+*/
+
+#include <string.h>
+#include <ctype.h>
+
+#define NUL '\0'
+
+char *rmtrail(char *str)
+{
+ int i;
+
+ if (0 != (i = strlen(str)))
+ {
+ while (--i >= 0)
+ {
+ if (!isspace(str[i]))
+ break;
+ }
+ str[++i] = NUL;
+ }
+ return str;
+}