diff --git a/src/bin/network/tcpdump/libpcap/Jamfile b/src/bin/network/tcpdump/libpcap/Jamfile
index 68c030b020..36e87f1cd1 100644
--- a/src/bin/network/tcpdump/libpcap/Jamfile
+++ b/src/bin/network/tcpdump/libpcap/Jamfile
@@ -26,3 +26,6 @@ StaticLibrary libpcap.a :
 	scanner.l
 	version.c
 ;
+
+# scanner.l includes the generated grammar.h
+Includes [ FGristFiles scanner.l ] : [ FGristFiles grammar.h ] ;