diff --git a/Makefile b/Makefile
index 8da7e935c..96e157e21 100644
--- a/Makefile
+++ b/Makefile
@@ -50,6 +50,7 @@ BUILD_TLS=1
 BUILD_SQLITE=1
 BUILD_CONTACT_HEADER=0
 BUILD_RTP_MAP=0
+BUILD_DONT_CHECK_HEADERS_IN_MESSAGE=0
 
 # Checks
 CHECK_MSG=$(shell ./check_tools.sh)
@@ -309,7 +310,8 @@ GENERATE_OPTIONS = NDK_DEBUG=$(NDK_DEBUG) BUILD_FOR_X86=$(BUILD_FOR_X86) \
 LIBLINPHONE_OPTIONS = $(GENERATE_OPTIONS) \
 	LINPHONE_VERSION=$(LINPHONE_VERSION) BELLESIP_VERSION=$(BELLESIP_VERSION) USE_JAVAH=$(USE_JAVAH) \
 	BUILD_REMOTE_PROVISIONING=$(BUILD_REMOTE_PROVISIONING) BUILD_TUNNEL=$(BUILD_TUNNEL) BUILD_TLS=$(BUILD_TLS) BUILD_SQLITE=$(BUILD_SQLITE) \
-	BUILD_CONTACT_HEADER=$(BUILD_CONTACT_HEADER) BUILD_RTP_MAP=$(BUILD_RTP_MAP)
+	BUILD_CONTACT_HEADER=$(BUILD_CONTACT_HEADER) BUILD_RTP_MAP=$(BUILD_RTP_MAP) \
+	BUILD_DONT_CHECK_HEADERS_IN_MESSAGE=$(BUILD_DONT_CHECK_HEADERS_IN_MESSAGE)
 
 MEDIASTREAMER2_OPTIONS = $(GENERATE_OPTIONS) BUILD_MEDIASTREAMER2_SDK=1
 
diff --git a/submodules/belle-sip b/submodules/belle-sip
index d9849d09d..e6206880e 160000
--- a/submodules/belle-sip
+++ b/submodules/belle-sip
@@ -1 +1 @@
-Subproject commit d9849d09d1fac97cad61fa63465d6c7454bc241e
+Subproject commit e6206880e1e0a9956da26af4f90cbf8aff5cc805