diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 58c05e5d9870..011d464d2132 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -176,7 +176,6 @@ ld_flags       = $(LDFLAGS) $(ldflags-y)
 dtc_cpp_flags  = -Wp,-MD,$(depfile).pre.tmp -nostdinc                    \
 		 -I$(srctree)/arch/$(SRCARCH)/boot/dts                   \
 		 -I$(srctree)/scripts/dtc/include-prefixes               \
-		 -I$(srctree)/drivers/of/testcase-data                   \
 		 -undef -D__DTS__
 
 # Finds the multi-part object the current object will be linked into