diff --git a/modules/compression/compression.c b/modules/compression/compression.c
index b58c7a0e624..aea52335d72 100644
--- a/modules/compression/compression.c
+++ b/modules/compression/compression.c
@@ -212,6 +212,7 @@ int compact_form_hdrs[]={
 	HDR_TO_T,
 	HDR_VIA_T,
 	HDR_SUPPORTED_T,
+	HDR_SESSION_EXPIRES_T,
 	HDR_OTHER_T
 };