diff -rup rcs-5.7/src/ident.c rcs-5.7mzk/src/ident.c
--- rcs-5.7/src/ident.c	1995-06-16 08:19:24.000000000 +0200
+++ rcs-5.7mzk/src/ident.c	2007-07-17 15:23:15.000000000 +0200
@@ -228,12 +228,18 @@ match(fp)   /* group substring between t
    char line[BUFSIZ];
    register int c;
    register char * tp;
+   int COLON_C = 0;
+   int MAX_COLON = 1;
 
    tp = line;
-   while ((c = getc(fp)) != VDELIM) {
+   while ((c = getc(fp)) && (COLON_C < MAX_COLON)) {
       if (c == EOF  &&  feof(fp) | ferror(fp))
 	 return c;
       switch (ctab[c]) {
+     case COLON:
+                *tp++ = c;
+                COLON_C++;
+                break;
 	 case LETTER: case Letter:
 	    *tp++ = c;
 	    if (tp < line+sizeof(line)-4)
@@ -245,7 +251,12 @@ match(fp)   /* group substring between t
    }
    if (tp == line)
       return c;
-   *tp++ = c;
+      if(c == ' '){
+          ungetc(c,fp);
+      }
+      else{
+          *tp++ = c;
+      }
    if ((c = getc(fp)) != ' ')
       return c ? c : '\n';
    *tp++ = c;