--- a/configure.in
+++ b/configure.in
@@ -331,8 +331,8 @@ dnl> user defined directory passed as op
 dnl>
 if test ".${PCAP_ROOT}" != .; then
   if test -d $PCAP_ROOT &&
-     test -r $PCAP_ROOT/libpcap.a &&
-     test -r $PCAP_ROOT/pcap.h; then
+     test -r $PCAP_ROOT/lib/libpcap.a &&
+     test -r $PCAP_ROOT/include/pcap.h; then
        PCAP_ROOT=`cd ${PCAP_ROOT} && pwd`
        CORELIBS="${CORELIBS} -L$PCAP_ROOT -lpcap"
        INCS="${INCS} -I$PCAP_ROOT"