diff --git a/src/configure.in b/src/configure.in
index 58ff282f3adec0bfa00c7a412c96df7e746eba67..21036d1dcf4a0c73beaea6895948324180cc67ac 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -1,4 +1,4 @@
-AC_REVISION("$Id: configure.in,v 1.191 1998/05/22 11:56:14 grubba Exp $")
+AC_REVISION("$Id: configure.in,v 1.192 1998/05/22 13:09:31 grubba Exp $")
 AC_INIT(interpret.c)
 AC_CONFIG_HEADER(machine.h)
 
@@ -411,6 +411,8 @@ else
   :
 fi
 
+CPPFLAGS="${CPPFLAGS} -I$srcdir"
+
 echo Searching for library directories...
 if test $ldflags_is_set = no ; then
   for d in `echo ${with_lib_path} | sed 's/:/ /g'` \