diff --git a/net/netx/Module.mk b/net/netx/Module.mk
index 847e0df292e8cb4ccd50dc2d3520879a526eeb00..e136f8ae77ae553653d0ccfa65fce8a2bf85e7a2 100644
--- a/net/netx/Module.mk
+++ b/net/netx/Module.mk
@@ -53,7 +53,7 @@ endif
 # Xrootd includes
 NETXINCEXTRA := $(XROOTDDIRI:%=-I%)
 ifneq ($(EXTRA_XRDFLAGS),)
-NETXINCEXTRA += -Iproof/proofd/inc
+NETXINCEXTRA += -I$(ROOT_SRCDIR)/proof/proofd/inc
 endif
 
 # Xrootd client libs