diff --git a/arch/Config.in.aarch64 b/arch/Config.in.aarch64
index 4c68a378c..2e79870b3 100644
--- a/arch/Config.in.aarch64
+++ b/arch/Config.in.aarch64
@@ -3,3 +3,6 @@ config BR2_ARCH
 
 config BR2_ENDIAN
 	default "LITTLE"
+
+config BR2_ARCH_HAS_ATOMICS
+	default y
diff --git a/arch/Config.in.arm b/arch/Config.in.arm
index 4cc41f10a..e404a505f 100644
--- a/arch/Config.in.arm
+++ b/arch/Config.in.arm
@@ -340,6 +340,9 @@ config BR2_ENDIAN
 	default "LITTLE" if BR2_arm
 	default "BIG"	 if BR2_armeb
 
+config BR2_ARCH_HAS_ATOMICS
+	default y
+
 config BR2_GCC_TARGET_CPU
 	default "arm920"	if BR2_arm920
 	default "arm920t"	if BR2_arm920t