diff --git a/contrib/src/pjproject/rules.mak b/contrib/src/pjproject/rules.mak
index eabe38d0aec68b86eade49878f70fc0ca84c7f47..682b86618a425fa37617ef2f60927b9e825858d4 100644
--- a/contrib/src/pjproject/rules.mak
+++ b/contrib/src/pjproject/rules.mak
@@ -33,8 +33,8 @@ ifdef HAVE_IOS
 PJPROJECT_OPTIONS += --with-ssl=$(PREFIX)
 endif
 
-PJPROJECT_EXTRA_CFLAGS = -DPJ_ICE_MAX_CAND=32 -DPJ_ICE_MAX_CHECKS=150 -DPJ_ICE_COMP_BITS=2 -DPJ_ICE_MAX_STUN=3
-PJPROJECT_EXTRA_CXXFLAGS = -DPJ_ICE_MAX_CAND=32 -DPJ_ICE_MAX_CHECKS=150 -DPJ_ICE_COMP_BITS=2 -DPJ_ICE_MAX_STUN=3 -std=gnu++11
+PJPROJECT_EXTRA_CFLAGS = -DPJ_ICE_MAX_CAND=32 -DPJ_ICE_MAX_CHECKS=150 -DPJ_ICE_COMP_BITS=2 -DPJ_ICE_MAX_STUN=3 -DPJSIP_MAX_PKT_LEN=8000
+PJPROJECT_EXTRA_CXXFLAGS = -DPJ_ICE_MAX_CAND=32 -DPJ_ICE_MAX_CHECKS=150 -DPJ_ICE_COMP_BITS=2 -DPJ_ICE_MAX_STUN=3 -DPJSIP_MAX_PKT_LEN=8000 -std=gnu++11
 
 ifdef HAVE_WIN64
 PJPROJECT_EXTRA_CFLAGS += -DPJ_WIN64=1
diff --git a/globals.mk b/globals.mk
index a467a69a633ae6320259523dc2eaf177b4408fb0..218680204e86cbf1c62fb5187724ad1382b2725a 100644
--- a/globals.mk
+++ b/globals.mk
@@ -34,6 +34,7 @@ AM_CPPFLAGS = \
 	-DENABLE_TRACE \
 	-DRING_REVISION=\"$(RING_REVISION)\" \
 	-DRING_DIRTY_REPO=\"$(RING_DIRTY_REPO)\" \
+    -DPJSIP_MAX_PKT_LEN=8000 \
 	$(SPEEXCODEC) \
 	$(GSMCODEC) \
 	$(OPUSCODEC)