diff --git a/scripts/Makefile.toolchain.iamcu b/scripts/Makefile.toolchain.iamcu
index 4cf70c2a119..3ea362f6624 100644
--- a/scripts/Makefile.toolchain.iamcu
+++ b/scripts/Makefile.toolchain.iamcu
@@ -3,7 +3,7 @@ $(error IAMCU_TOOLCHAIN_PATH is not set)
 endif
 
 CROSS_COMPILE_TARGET_x86 = i586-intel-elfiamcu
-CROSS_COMPILE_x86_version = 4.9.3
+CROSS_COMPILE_x86_version = 5.2.1
 CROSS_COMPILE_x86=${IAMCU_TOOLCHAIN_PATH}/bin/${CROSS_COMPILE_TARGET_x86}-
 TOOLCHAIN_CFLAGS_x86 = -I${IAMCU_TOOLCHAIN_PATH}/$(CROSS_COMPILE_TARGET_x86)/include/