diff --git a/zeek-config-paths.h.in b/zeek-config-paths.h.in
index a49c248840..be135e8b93 100644
--- a/zeek-config-paths.h.in
+++ b/zeek-config-paths.h.in
@@ -1,3 +1,5 @@
+// See the file "COPYING" in the main distribution directory for copyright.
+
 #pragma once
 
 #define ZEEK_SCRIPT_INSTALL_PATH "@ZEEK_SCRIPT_INSTALL_PATH@"
diff --git a/zeek-config.h.in b/zeek-config.h.in
index e475098986..7f9fe60a0c 100644
--- a/zeek-config.h.in
+++ b/zeek-config.h.in
@@ -1,3 +1,5 @@
+// See the file "COPYING" in the main distribution directory for copyright.
+
 #pragma once
 
 /* Old libpcap versions (< 0.6.1) need defining pcap_freecode and
diff --git a/zeek-version.h.in b/zeek-version.h.in
index 30b0c914ba..f09f9ce5a7 100644
--- a/zeek-version.h.in
+++ b/zeek-version.h.in
@@ -1,3 +1,5 @@
+// See the file "COPYING" in the main distribution directory for copyright.
+
 #pragma once
 
 /* Version number of package */