diff --git a/src/mainboard/system76/rpl/Kconfig b/src/mainboard/system76/rpl/Kconfig
index 89ef54022a..fb2acc695a 100644
--- a/src/mainboard/system76/rpl/Kconfig
+++ b/src/mainboard/system76/rpl/Kconfig
@@ -14,6 +14,7 @@ config BOARD_SYSTEM76_RPL_COMMON
 	select MAINBOARD_HAS_TPM2
 	select MEMORY_MAPPED_TPM
 	select NO_UART_ON_SUPERIO
+	select PCIEXP_SUPPORT_RESIZABLE_BARS
 	select SOC_INTEL_ALDERLAKE_S3
 	select SOC_INTEL_COMMON_BLOCK_HDA_VERB
 	select SOC_INTEL_COMMON_BLOCK_TCSS
@@ -100,6 +101,9 @@ config DIMM_SPD_SIZE
 config ONBOARD_VGA_IS_PRIMARY
 	default y
 
+config PCIEXP_DEFAULT_MAX_RESIZABLE_BAR_BITS
+	default 36
+
 config POST_DEVICE
 	default n