diff --git a/PKGBUILD b/PKGBUILD
index 542c8a236c03735f167e201db0a8bc275e78c769..2162a8263cbc845a755a966c15aa0ea36e24f1f6 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -180,7 +180,7 @@ build() {
   update_config 'CONFIG_SPL_HAS_BSS_LINKER_SECTION' 'y'
   update_config 'CONFIG_SPL_BSS_START_ADDR' '0x400000'
   update_config 'CONFIG_SPL_BSS_MAX_SIZE' '0x2000'
-  update_config 'CONFIG_SPL_STACK=0x400000
+  update_config 'CONFIG_SPL_STACK' '0x400000'
   update_config 'CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR' 'y'
   update_config 'CONFIG_CUSTOM_SYS_INIT_SP_ADDR' '0x300000'
   update_config 'CONFIG_BOOTSTD_FULL' 'y'