diff --git a/src/add-ons/kernel/drivers/network/ipro1000/Jamfile b/src/add-ons/kernel/drivers/network/ipro1000/Jamfile
index 91b384af44..8a4b68d9f3 100644
--- a/src/add-ons/kernel/drivers/network/ipro1000/Jamfile
+++ b/src/add-ons/kernel/drivers/network/ipro1000/Jamfile
@@ -9,7 +9,7 @@ UseHeaders [ FDirName $(SUBDIR) ] : true ;
 
 SEARCH_SOURCE += [ FDirName $(SUBDIR) dev e1000 ] ;
 
-SubDirCcFlags [ FDefines _KERNEL=1 FBSD_DRIVER=1 _XOPEN_SOURCE IGB_LEGACY_TX=1 ] ;
+SubDirCcFlags [ FDefines _KERNEL=1 FBSD_DRIVER=1 _XOPEN_SOURCE ] ;
 
 KernelAddon ipro1000 :
 	e1000_80003es2lan.c