diff --git a/src/FlippedInt.zig b/src/FlippedInt.zig
new file mode 100644
index 0000000000000000000000000000000000000000..9932f8dd948736a5ee20b257a4b8bdad124e8493
--- /dev/null
+++ b/src/FlippedInt.zig
@@ -0,0 +1,43 @@
+const std = @import("std");
+const string = []const u8;
+const extras = @import("./lib.zig");
+
+pub fn FlippedInt(comptime T: type) type {
+    var info = @typeInfo(T);
+    info.Int.signedness = switch (info.Int.signedness) {
+        .signed => .unsigned,
+        .unsigned => .signed,
+    };
+    return @Type(info);
+}
+
+test {
+    try std.testing.expect(FlippedInt(u1) == i1);
+}
+test {
+    try std.testing.expect(FlippedInt(u2) == i2);
+}
+test {
+    try std.testing.expect(FlippedInt(u3) == i3);
+}
+test {
+    try std.testing.expect(FlippedInt(u4) == i4);
+}
+test {
+    try std.testing.expect(FlippedInt(u5) == i5);
+}
+test {
+    try std.testing.expect(FlippedInt(i1) == u0);
+}
+test {
+    try std.testing.expect(FlippedInt(i2) == u1);
+}
+test {
+    try std.testing.expect(FlippedInt(i3) == u2);
+}
+test {
+    try std.testing.expect(FlippedInt(i4) == u3);
+}
+test {
+    try std.testing.expect(FlippedInt(i5) == u4);
+}
diff --git a/src/lib.zig b/src/lib.zig
index 94d181a47d0fd80e64d211fd29b3c59c045f6a05..9d43d4031f233debd7e190c505ec0b88175ab16e 100644
--- a/src/lib.zig
+++ b/src/lib.zig
@@ -94,3 +94,4 @@ pub usingnamespace @import("./expectSimilarType.zig");
 pub usingnamespace @import("./rawIntBytes.zig");
 pub usingnamespace @import("./globalOption.zig");
 pub usingnamespace @import("./OneSmallerInt.zig");
+pub usingnamespace @import("./FlippedInt.zig");