diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 00ddc87c0f..4e3279f103 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -40,6 +40,7 @@ config ARM_TOOLCHAIN_GNU_OABI
 
 config ARM_TOOLCHAIN_CLANG
 	bool "LLVM Clang toolchain"
+	depends on !LIBM_TOOLCHAIN
 	select ARCH_TOOLCHAIN_CLANG
 
 config ARM_TOOLCHAIN_ARMCLANG