diff --git a/arch/mips/include/asm/compiler.h b/arch/mips/include/asm/compiler.h
index 9196fca4335d..f77e99f1722e 100644
--- a/arch/mips/include/asm/compiler.h
+++ b/arch/mips/include/asm/compiler.h
@@ -43,18 +43,14 @@
 #undef barrier_before_unreachable
 #define barrier_before_unreachable() asm volatile(".insn")
 
-#ifdef CONFIG_CPU_MIPSR6
-/* All MIPS R6 toolchains support the ZC constrain */
-#define GCC_OFF_SMALL_ASM() "ZC"
+#if !defined(CONFIG_CC_IS_GCC) || \
+    (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 9)
+# define GCC_OFF_SMALL_ASM() "ZC"
+#elif defined(CONFIG_CPU_MICROMIPS)
+# error "microMIPS compilation unsupported with GCC older than 4.9"
 #else
-#ifndef CONFIG_CPU_MICROMIPS
-#define GCC_OFF_SMALL_ASM() "R"
-#elif __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 9)
-#define GCC_OFF_SMALL_ASM() "ZC"
-#else
-#error "microMIPS compilation unsupported with GCC older than 4.9"
-#endif /* CONFIG_CPU_MICROMIPS */
-#endif /* CONFIG_CPU_MIPSR6 */
+# define GCC_OFF_SMALL_ASM() "R"
+#endif
 
 #ifdef CONFIG_CPU_MIPSR6
 #define MIPS_ISA_LEVEL "mips64r6"