diff --git a/src/security/intel/stm/StmPlatformResource.c b/src/security/intel/stm/StmPlatformResource.c
index a8da98c..75d52a2 100644
--- a/src/security/intel/stm/StmPlatformResource.c
+++ b/src/security/intel/stm/StmPlatformResource.c
@@ -98,8 +98,8 @@
 static void fixup_pciex_resource(void)
 {
 	// Find max bus number and PCIEX length
-	rsc_pcie_mmio.length = CONFIG_MMCONF_LENGTH; // 0x10000000;// 256 MB
-	rsc_pcie_mmio.base = CONFIG_MMCONF_BASE_ADDRESS;
+	rsc_pcie_mmio.length = CONFIG_ECAM_MMCONF_LENGTH; // 0x10000000;// 256 MB
+	rsc_pcie_mmio.base = CONFIG_ECAM_MMCONF_BASE_ADDRESS;
 }
 
 /*