--- a/Makefile.in
+++ b/Makefile.in
-@@ -57,7 +57,7 @@ LN_S = @LN_S@
+@@ -56,7 +56,7 @@ LN_S = @LN_S@
MKDEP = @MKDEP@
CCOPT = @V_CCOPT@
INCLS = -I. @V_INCLS@
--DEFS = @DEFS@ @V_DEFS@
-+DEFS = -D_BSD_SOURCE @DEFS@ @V_DEFS@
+-DEFS = -DBUILDING_PCAP @DEFS@ @V_DEFS@
++DEFS = -DBUILDING_PCAP -D_BSD_SOURCE @DEFS@ @V_DEFS@
ADDLOBJS = @ADDLOBJS@
ADDLARCHIVEOBJS = @ADDLARCHIVEOBJS@
LIBS = @LIBS@