diff --git a/src/arch/x86/build_vars b/src/arch/x86/build_vars
index 98f1a8a..02b5a86 100644
--- a/src/arch/x86/build_vars
+++ b/src/arch/x86/build_vars
@@ -18,6 +18,6 @@
 ##
 
 VB_FIRMWARE_ARCH=x86
-ARCH_ABI_FLAGS += -mpreferred-stack-boundary=2 -mregparm=3
+ARCH_ABI_FLAGS += -mpreferred-stack-boundary=2
 ARCH_LINK_FLAGS := -Wl,--wrap=__divdi3 -Wl,--wrap=__udivdi3 \
 	-Wl,--wrap=__moddi3 -Wl,--wrap=__umoddi3