diff --git a/boards/arm/cxd56xx/spresense/scripts/Make.defs b/boards/arm/cxd56xx/spresense/scripts/Make.defs
index 01f5b2cdc5b7e..d25e031848ff9 100644
--- a/boards/arm/cxd56xx/spresense/scripts/Make.defs
+++ b/boards/arm/cxd56xx/spresense/scripts/Make.defs
@@ -61,7 +61,7 @@ CC = $(CROSSDEV)gcc
 CXX = $(CROSSDEV)g++
 CPP = $(CROSSDEV)gcc -E
 LD = $(CROSSDEV)ld
-AR = $(ARCROSSDEV)ar rcs
+AR = flock $(TOPDIR) $(ARCROSSDEV)ar rcs
 NM = $(ARCROSSDEV)nm
 OBJCOPY = $(CROSSDEV)objcopy
 OBJDUMP = $(CROSSDEV)objdump