diff --git a/rdmaxcel-sys/src/lib.rs b/rdmaxcel-sys/src/lib.rs
index f493273ba..d07154114 100644
--- a/rdmaxcel-sys/src/lib.rs
+++ b/rdmaxcel-sys/src/lib.rs
@@ -15,14 +15,60 @@ mod inner {
     #![allow(non_snake_case)]
     #![allow(unused_attributes)]
     #[cfg(not(cargo))]
-    use crate::ibv_wc_flags;
-    #[cfg(not(cargo))]
     use crate::ibv_wc_opcode;
     #[cfg(not(cargo))]
     use crate::ibv_wc_status;
     #[cfg(cargo)]
     include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
 
+    // Manually define ibv_wc_flags as a bitfield (bindgen isn't generating it)
+    #[repr(transparent)]
+    #[derive(Debug, Copy, Clone, PartialEq, Eq, Default)]
+    pub struct ibv_wc_flags(pub u32);
+
+    impl ibv_wc_flags {
+        pub const IBV_WC_GRH: Self = Self(1 << 0);
+        pub const IBV_WC_WITH_IMM: Self = Self(1 << 1);
+        pub const IBV_WC_IP_CSUM_OK: Self = Self(1 << 2);
+        pub const IBV_WC_WITH_INV: Self = Self(1 << 3);
+        pub const IBV_WC_TM_SYNC_REQ: Self = Self(1 << 4);
+        pub const IBV_WC_TM_MATCH: Self = Self(1 << 5);
+        pub const IBV_WC_TM_DATA_VALID: Self = Self(1 << 6);
+    }
+
+    impl std::ops::BitAnd for ibv_wc_flags {
+        type Output = Self;
+        fn bitand(self, rhs: Self) -> Self {
+            Self(self.0 & rhs.0)
+        }
+    }
+
+    // Manually define ibv_access_flags as a bitfield (bindgen isn't generating it)
+    #[repr(transparent)]
+    #[derive(Debug, Copy, Clone, PartialEq, Eq, Default)]
+    pub struct ibv_access_flags(pub u32);
+
+    impl ibv_access_flags {
+        pub const IBV_ACCESS_LOCAL_WRITE: Self = Self(1 << 0);
+        pub const IBV_ACCESS_REMOTE_WRITE: Self = Self(1 << 1);
+        pub const IBV_ACCESS_REMOTE_READ: Self = Self(1 << 2);
+        pub const IBV_ACCESS_REMOTE_ATOMIC: Self = Self(1 << 3);
+        pub const IBV_ACCESS_MW_BIND: Self = Self(1 << 4);
+        pub const IBV_ACCESS_ZERO_BASED: Self = Self(1 << 5);
+        pub const IBV_ACCESS_ON_DEMAND: Self = Self(1 << 6);
+        pub const IBV_ACCESS_HUGETLB: Self = Self(1 << 7);
+        pub const IBV_ACCESS_RELAXED_ORDERING: Self = Self(1 << 8);
+        pub const IBV_ACCESS_FLUSH_GLOBAL: Self = Self(1 << 9);
+        pub const IBV_ACCESS_FLUSH_PERSISTENT: Self = Self(1 << 10);
+    }
+
+    impl std::ops::BitOr for ibv_access_flags {
+        type Output = Self;
+        fn bitor(self, rhs: Self) -> Self {
+            Self(self.0 | rhs.0)
+        }
+    }
+
     #[repr(C, packed(1))]
     #[derive(Debug, Default, Clone, Copy)]
     pub struct mlx5_wqe_ctrl_seg {