diff --git a/src/arch/arm/CodeGen.zig b/src/arch/arm/CodeGen.zig
index 02ca66f297919f83f8bf9ff91f0cbf99dc16eb63..93e6e95ba9ae4076a2d6aa4a843d544cf0c25595 100644
--- a/src/arch/arm/CodeGen.zig
+++ b/src/arch/arm/CodeGen.zig
@@ -1455,6 +1455,10 @@ fn airOverflow(self: *Self, inst: Air.Inst.Index) !void {
                         }
                     };
 
+                    if (tag == .sub_with_overflow) {
+                        break :result MCValue{ .register_v_flag = dest.register };
+                    }
+
                     switch (int_info.signedness) {
                         .unsigned => break :result MCValue{ .register_c_flag = dest.register },
                         .signed => break :result MCValue{ .register_v_flag = dest.register },