Fix name for variable containing libpcap library path.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index e04e226..67aae5b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -486,7 +486,7 @@
 # We have libpcap.
 #
 include_directories(SYSTEM ${PCAP_INCLUDE_DIRS})
-set(TCPDUMP_LINK_LIBRARIES ${PCAP_LINK_LIBRARY})
+set(TCPDUMP_LINK_LIBRARIES ${PCAP_LIBRARY})
 
 #
 # Optional libraries.