diff --git a/build/find_libmodsec.m4 b/build/find_libmodsec.m4
index 2a6c82d..54d84f9 100644
--- a/build/find_libmodsec.m4
+++ b/build/find_libmodsec.m4
@@ -4,7 +4,7 @@ AC_MSG_NOTICE(looking for libmodsecurity)
 # Check if the user provided --with-libmodsecurity
 AC_ARG_WITH(libmodsecurity,
             [AS_HELP_STRING([[--with-libmodsecurity=FILE]],
-                            [FILE is the path to libmodsecurity install dir; defaults to "/usr/local/modsecurity/".])],
+                            [FILE is the path to libmodsecurity install dir; defaults to "/usr/local/modsecurity".])],
 [
   if test "$withval" = "yes"; then
     V3PATH=/usr/local/modsecurity/
@@ -13,27 +13,39 @@ AC_ARG_WITH(libmodsecurity,
   fi
 ])
 
+# --with-libmodsecurity=/my/absolute/path is provided, 
+# do some checks
+if test -n "$V3PATH"; then
+  if test -f "$V3PATH/lib/libmodsecurity.so"; then 
+  	V3LIB="$V3PATH/lib/"
+  fi
+  if test -f "$V3PATH/include/modsecurity/modsecurity.h"; then 
+  	V3INCLUDE="$V3PATH/include/"
+  fi  
+fi
+
+# --with-libmodsecurity= is set to empty, 
+# do some blind guessing
 if test -z "$V3PATH"; then
-  for i in /usr/local/modsecurity/ \
+  for i in /usr/local/modsecurity \
            /usr/local/sbin \
            /usr/local/bin \
            /usr/sbin \
-           /usr/bin;
+           /usr/bin \
+	   	   /usr
   do
     if test -f "$i/lib/libmodsecurity.so"; then
       V3LIB="$i/lib/"
     fi
     if test -f "$i/include/modsecurity/modsecurity.h"; then
       V3INCLUDE="$i/include/"
-      # TODO: test if V3LIB is set
-      break
     fi  
   done
 fi
+
 if test -n "$V3LIB" -a "$V3LIB" != "no" -a -x "$V3LIB" ; then
     AC_MSG_NOTICE(found libmodsecurity at $V3LIB)
 else
     AC_MSG_ERROR(couldn't find libmodsecurity)
 fi
 ])
-