diff --git a/payloads/external/Makefile.inc b/payloads/external/Makefile.inc
index 049fcd9ce8..e805a07b0a 100644
--- a/payloads/external/Makefile.inc
+++ b/payloads/external/Makefile.inc
@@ -156,6 +156,7 @@ $(obj)/UEFIPAYLOAD.fd tianocore: $(DOTCONFIG)
 		CONFIG_TIANOCORE_HAVE_EFI_SHELL=$(CONFIG_TIANOCORE_HAVE_EFI_SHELL) \
 		CONFIG_TIANOCORE_PRIORITIZE_INTERNAL=$(CONFIG_TIANOCORE_PRIORITIZE_INTERNAL) \
 		CONFIG_TIANOCORE_PS2_SUPPORT=$(CONFIG_TIANOCORE_PS2_SUPPORT) \
+		CONFIG_TIANOCORE_SD_MMC_TIMEOUT=$(CONFIG_TIANOCORE_SD_MMC_TIMEOUT) \
 		CONFIG_TIANOCORE_USE_8254_TIMER=$(CONFIG_TIANOCORE_USE_8254_TIMER) \
 		CONFIG_ECAM_MMCONF_BASE_ADDRESS=$(CONFIG_ECAM_MMCONF_BASE_ADDRESS) \
 		GCC_CC_x86_32=$(GCC_CC_x86_32) \
diff --git a/payloads/external/tianocore/Kconfig b/payloads/external/tianocore/Kconfig
index 4d52994dd5..4194290747 100644
--- a/payloads/external/tianocore/Kconfig
+++ b/payloads/external/tianocore/Kconfig
@@ -168,6 +168,13 @@ config TIANOCORE_PS2_SUPPORT
 	help
 	  Include support for PS/2 keyboards
 
+config TIANOCORE_SD_MMC_TIMEOUT
+	int "Timeout in μs for initializing SD Card reader"
+	default 1000
+	help
+	  The amount of time allowed to initialize the SD Card reader and/or eMMC drive.
+	  Most only require 1000μs, but certain readers can take 1000000μs.
+
 endif
 
 if TIANOCORE_COREBOOTPAYLOAD
diff --git a/payloads/external/tianocore/Makefile b/payloads/external/tianocore/Makefile
index c6247cdefc..437e706d55 100644
--- a/payloads/external/tianocore/Makefile
+++ b/payloads/external/tianocore/Makefile
@@ -64,6 +64,10 @@ endif
 ifeq ($(CONFIG_TIANOCORE_CBMEM_LOGGING),y)
 BUILD_STR += -D USE_CBMEM_FOR_CONSOLE=TRUE
 endif
+# SD_MMC_TIMEOUT		= 1000000
+ifneq ($(CONFIG_TIANOCORE_SD_MMC_TIMEOUT),)
+BUILD_STR += -D SD_MMC_TIMEOUT=$(CONFIG_TIANOCORE_SD_MMC_TIMEOUT)
+endif
 #
 # The below are legacy options only available in CorebootPayloadPkg:
 #