diff --git a/generator/sections/gen-section-pcie.c b/generator/sections/gen-section-pcie.c
index eaf050c..db9dfd9 100644
--- a/generator/sections/gen-section-pcie.c
+++ b/generator/sections/gen-section-pcie.c
@@ -13,7 +13,8 @@
 
 //Generates a single pseudo-random PCIe error section, saving the resulting address to the given
 //location. Returns the size of the newly created section.
-size_t generate_section_pcie(void **location)
+size_t generate_section_pcie(void **location,
+			     GEN_VALID_BITS_TEST_TYPE validBitsType)
 {
 	//Create random bytes.
 	int size = 208;
@@ -21,7 +22,12 @@
 
 	//Set reserved areas to zero.
 	UINT64 *validation = (UINT64 *)bytes;
-	*validation &= 0xFF;   //Validation 8-63
+	*validation &= 0xFF; //Validation 8-63
+	if (validBitsType == ALL_VALID) {
+		*validation = 0xFF;
+	} else if (validBitsType == SOME_VALID) {
+		*validation = 0x55;
+	}
 	UINT32 *version = (UINT32 *)(bytes + 12);
 	*version &= 0xFFFF;    //Version bytes 2-3
 	UINT32 *reserved = (UINT32 *)(bytes + 20);