diff --git a/CHANGES b/CHANGES
index df7bd8c..a08bbbb 100644
--- a/CHANGES
+++ b/CHANGES
@@ -11,6 +11,7 @@
   add taia_half
   add cdb
   add rangecheck.h
+  add io_block
 
 0.24:
   fix scan_to_sa (Tim Lorenz)
diff --git a/GNUmakefile b/GNUmakefile
index 9d9cec0..b7776c3 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -159,7 +159,7 @@ dep libsocket havealloca.h
 INCLUDES=buffer.h byte.h fmt.h ip4.h ip6.h mmap.h scan.h socket.h str.h stralloc.h \
 uint16.h uint32.h uint64.h open.h textcode.h tai.h taia.h dns.h iopause.h case.h \
 openreadclose.h readclose.h ndelay.h array.h io.h safemult.h iob.h havealloca.h \
-errmsg.h cdb.h cdb_make.h
+errmsg.h cdb.h cdb_make.h rangecheck.h
 
 install: libowfat.a
 	install -d $(INCLUDEDIR) $(MAN3DIR) $(LIBDIR)
diff --git a/rangecheck.h b/rangecheck.h
index 163ae22..b6b8bdd 100644
--- a/rangecheck.h
+++ b/rangecheck.h
@@ -48,7 +48,7 @@ __static inline int range_bufinbuf(const void* buf1,size_t len1,const void* buf2
 
 /* does an array of "elements" members of size "membersize" starting at
  * "arraystart" lie inside buf1[0..len-1]? */
-int range_arrayinbuf(const void* buf1,size_t len,
+int range_arrayinbuf(const void* buf,size_t len,
 		     const void* arraystart,size_t elements,size_t membersize);
 
 /* does an ASCIIZ string starting at "ptr" lie in buf[0..len-1]? */