diff --git a/toolchain/Config.in b/toolchain/Config.in
index baf69ce463..33a88ff738 100644
--- a/toolchain/Config.in
+++ b/toolchain/Config.in
@@ -94,6 +94,7 @@ config BR2_TOOLCHAIN_SUPPORTS_ALWAYS_LOCKFREE_ATOMIC_INTS
 	depends on !BR2_ARM_CPU_ARMV5
 	depends on !BR2_sparc_v8
 	depends on !BR2_m68k_cf5208
+	depends on !(BR2_arc && !BR2_ARC_ATOMIC_EXT)
 
 # GCC uses thunk functions to adjust the 'this' pointer when calling
 # C++ member functions in classes derived with multiple inheritance.