diff --git a/rules.mk b/rules.mk
index 61c45a0090..6a283bd647 100644
--- a/rules.mk
+++ b/rules.mk
@@ -81,7 +81,7 @@ ifdef CONFIG_HAS_SPE_FPU
 endif
 ifdef CONFIG_MIPS64_ABI
   ifneq ($(CONFIG_MIPS64_ABI_O32),y)
-     ARCH_SUFFIX:=$(ARCH_SUFFIX)_$(subst ",,$(CONFIG_MIPS64_ABI))
+     ARCH_SUFFIX:=$(ARCH_SUFFIX)_$(call qstrip,$(CONFIG_MIPS64_ABI))
   endif
 endif