diff --git a/httpcomponents-core.spec b/httpcomponents-core.spec
index 0e2baea..e6ff8f8 100644
--- a/httpcomponents-core.spec
+++ b/httpcomponents-core.spec
@@ -1,3 +1,7 @@
+# READ BEFORE UPDATING: After updating this package to new upstream
+# version eclipse-ecf should be rebuilt.  For more info, see:
+# https://fedoraproject.org/wiki/SIGs/Java#Package_Update.2FRebuild_Notes
+
 %global base_name httpcomponents
 
 Name:              httpcomponents-core