diff --git a/RELNOTES b/RELNOTES
index dd118d5e..039b6a3d 100644
--- a/RELNOTES
+++ b/RELNOTES
@@ -50,6 +50,8 @@ work on other platforms. Please report any problems and suggested fixes to
   (which are bogus corruption read from the packet anyway).  It also
   carries a hopefully more useful explanation.
 
+- Suppress spurious warnings from configure about --datarootdir
+
 			Changes since 4.1.0b1
 
 - A missing "else" in dhcrelay.c could have caused an interface not to
diff --git a/configure.ac b/configure.ac
index 781300c1..f16ee875 100644
--- a/configure.ac
+++ b/configure.ac
@@ -12,6 +12,9 @@ SAVE_CFLAGS="$CFLAGS"
 # Now find our C compiler.
 AC_PROG_CC
 
+# Suppress warnings about --datarootdir
+AC_DEFUN([AC_DATAROOTDIR_CHECKED])
+
 # If we have gcc, and AC_PROG_CC changed the flags, then we know the
 # user did not specify any flags. Add warnings in this case.
 if test "$GCC" = "yes"; then