diff --git a/Makefile b/Makefile
index 582e29c..88b6444 100644
--- a/Makefile
+++ b/Makefile
@@ -1158,7 +1158,7 @@
       cmd_headers_install = \
 	mkdir -p $(INSTALL_HDR_PATH); \
 	rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
-	usr/include $(INSTALL_HDR_PATH)
+	$(hdr-prefix)usr/include $(INSTALL_HDR_PATH);
 
 PHONY += headers_install
 headers_install: headers