diff --git a/.travis.yml b/.travis.yml
index 9aac6c597cd9608c293b3d0f9b49c0db3fa5d9a4..d814a465e67468fc05c2d03b62c092a9c5130e22 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -270,19 +270,20 @@ matrix:
         fi
       - make > /dev/null
 
-#  - os: osx
-#    language: c
-#    compiler: clang
-#    env: DESC="mac/clang build"
-#    git:
-#      - depth: 1
-#    addons:
-#      homebrew:
-#        - cmake
-#
-#    script:
-#      - cd ${TRAVIS_BUILD_DIR}
-#      - mkdir debug
-#      - cd debug
-#      - cmake .. > /dev/null
-#      - make > /dev/null
+  - os: osx
+    osx_image: xcode11.4
+    language: c
+    compiler: clang
+    env: DESC="mac/clang build"
+    git:
+      - depth: 1
+    addons:
+      homebrew:
+        - cmake
+
+    script:
+      - cd ${TRAVIS_BUILD_DIR}
+      - mkdir debug
+      - cd debug
+      - cmake .. > /dev/null
+      - make > /dev/null
diff --git a/src/os/inc/osDarwin.h b/src/os/inc/osDarwin.h
index 13f93456f25999277b55da96628fcce482a643f6..14b8ccf53c5ca2c857a47c007a8ba5933e06ddc6 100644
--- a/src/os/inc/osDarwin.h
+++ b/src/os/inc/osDarwin.h
@@ -91,7 +91,12 @@ extern "C" {
 typedef int(*__compar_fn_t)(const void *, const void *);
 
 // for send function in tsocket.c
-// #define MSG_NOSIGNAL             0
+#if defined(MSG_NOSIGNAL)
+#undef MSG_NOSIGNAL
+#endif
+
+#define MSG_NOSIGNAL             0
+
 #define SO_NO_CHECK              0x1234
 #define SOL_TCP                  0x1234
 #define TCP_KEEPIDLE             0x1234