diff --git a/include/pci_caps/px.h b/include/pci_caps/px.h
index cd3c2f7d..d98650e8 100644
--- a/include/pci_caps/px.h
+++ b/include/pci_caps/px.h
@@ -163,11 +163,12 @@ struct pxdcap2 {
     uint32_t nprpr:1;
     uint32_t ltrs:1;
     uint32_t tphcs:2;
+    uint32_t res1:4;
     uint32_t obffs:2;
     uint32_t effs:1;
     uint32_t eetps:1;
     uint32_t meetp:2;
-    uint32_t res1:8;
+    uint32_t res2:8;
 } __attribute__((packed));
 _Static_assert(sizeof(struct pxdcap2) == 0x4, "bad PXDCAP2 size");