diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3a4449a..7fd9caa 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -128,10 +128,9 @@ jobs:
     # - name: HermitOS
     #   if: startsWith(matrix.rust, 'nightly') && startsWith(matrix.os, 'ubuntu')
     #   run: cargo check -Z build-std --target x86_64-unknown-hermit
-    # TODO:
-    # - name: Check haiku
-    #   if: startsWith(matrix.rust, 'nightly') && startsWith(matrix.os, 'ubuntu')
-    #   run: cargo check -Z build-std --target x86_64-unknown-haiku
+    - name: Check haiku
+      if: startsWith(matrix.rust, 'nightly') && startsWith(matrix.os, 'ubuntu')
+      run: cargo check -Z build-std --target x86_64-unknown-haiku
     - name: Check vita
       if: startsWith(matrix.rust, 'nightly') && startsWith(matrix.os, 'ubuntu')
       run: cargo check -Z build-std --target armv7-sony-vita-newlibeabihf
diff --git a/src/lib.rs b/src/lib.rs
index fd75258..140ce30 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2104,6 +2104,7 @@ fn connect(
             target_os = "aix",
             target_vendor = "apple",
             target_os = "espidf",
+            target_os = "haiku",
             windows,
         )))]
         let flags = rn::SocketFlags::CLOEXEC;
@@ -2111,6 +2112,7 @@ fn connect(
             target_os = "aix",
             target_vendor = "apple",
             target_os = "espidf",
+            target_os = "haiku",
             windows,
         ))]
         let flags = rn::SocketFlags::empty();