diff --git a/crates/cpu/src/unit/alu_branch.rs b/crates/cpu/src/unit/alu_branch.rs
index dc96bf4..e7d7601 100644
--- a/crates/cpu/src/unit/alu_branch.rs
+++ b/crates/cpu/src/unit/alu_branch.rs
@@ -114,7 +114,7 @@ fn add_sub<C: PhantomConstCpuConfig, SrcCount: KnownSize>(
     let x86_cf = wire();
     #[hdl]
     let x86_af = wire();
-    connect(x86_af, carries[&4]);
+    connect(x86_af, carries[&4] ^ invert_src0);
     #[hdl]
     let x86_of = wire();
     #[hdl]
@@ -125,7 +125,7 @@ fn add_sub<C: PhantomConstCpuConfig, SrcCount: KnownSize>(
     #[hdl]
     let x86_zf = wire();
     let set_x86_flags = |width| {
-        connect(x86_cf, carries[&width]);
+        connect(x86_cf, carries[&width] ^ invert_src0);
         connect(x86_of, carries[&width].cmp_ne(carries[&(width - 1)]));
         connect(x86_sf, sum[width - 1]);
         connect(x86_zf, sum[..width].cmp_eq(0u8));
diff --git a/crates/cpu/tests/expected/rename_execute_retire_save_restore_gprs_real.vcd b/crates/cpu/tests/expected/rename_execute_retire_save_restore_gprs_real.vcd
index 769cf99..831f6f3 100644
--- a/crates/cpu/tests/expected/rename_execute_retire_save_restore_gprs_real.vcd
+++ b/crates/cpu/tests/expected/rename_execute_retire_save_restore_gprs_real.vcd
@@ -87513,6 +87513,8 @@ b1111111111111111111111111111111111111111111111111111111111110001 Z<_QG
 b1111111111111111111111111111111111111111111111111111111111111111 `cG{N"
 b1111111111111111111111111111111111111111111111111111100000000001 6-Q>d"
 b1111111111111111111110000000000111111111111111111111100000000001 Z<_QG"
+0t/pUF"
+0NCFTu"
 1q=,:m"
 1c)52)"
 0fa7hn"
@@ -87924,7 +87926,7 @@ b1100000000000 6-Q>d"
 0rruTn"
 0<#SlY"
 b1100000000000 Z<_QG"
-0t/pUF"
+1NCFTu"
 0q=,:m"
 1`(dU("
 0YQaZZ"
@@ -170291,8 +170293,6 @@ b1111111111111111111111111111111111111111111111111111100000110000 LirfL"
 1FIp"#"
 1KUwM{"
 b1111111111111111111110000011000011111111111111111111100000110000 $ru{a"
-1R+kd["
-1AvcH="
 1oOiyJ"
 0e"l`;"
 1cq($'"
@@ -170466,8 +170466,6 @@ b11111100000000 LirfL"
 0FIp"#"
 0KUwM{"
 b11111100000000 $ru{a"
-0R+kd["
-0AvcH="
 0oOiyJ"
 0cq($'"
 0cBAjc"