diff --git a/packages/grpc-native-core/binding.gyp b/packages/grpc-native-core/binding.gyp
index 6c0a986d..b11c7611 100644
--- a/packages/grpc-native-core/binding.gyp
+++ b/packages/grpc-native-core/binding.gyp
@@ -118,11 +118,6 @@
           'GPR_MUSL_LIBC_COMPAT'
         ]
       }],
-      ['OS!="win" and runtime=="electron"', {
-        "defines": [
-          'OPENSSL_NO_THREADS'
-        ]
-      }],
       # This is the condition for using boringssl
       ['OS=="win" or runtime=="electron"', {
         "include_dirs": [
@@ -228,6 +223,9 @@
           'cflags': [
             '-Wno-implicit-fallthrough'
           ],
+          'defines': [
+            '_XOPEN_SOURCE=700'
+          ],
           'dependencies': [
           ],
           'sources': [
diff --git a/packages/grpc-native-core/templates/binding.gyp.template b/packages/grpc-native-core/templates/binding.gyp.template
index f9abaa7c..8addf14a 100644
--- a/packages/grpc-native-core/templates/binding.gyp.template
+++ b/packages/grpc-native-core/templates/binding.gyp.template
@@ -102,11 +102,6 @@
             'GPR_MUSL_LIBC_COMPAT'
           ]
         }],
-        ['OS!="win" and runtime=="electron"', {
-          "defines": [
-            'OPENSSL_NO_THREADS'
-          ]
-        }],
         # This is the condition for using boringssl
         ['OS=="win" or runtime=="electron"', {
           "include_dirs": [
@@ -200,6 +195,9 @@
             'cflags': [
               '-Wno-implicit-fallthrough'
             ],
+            'defines': [
+              '_XOPEN_SOURCE=700'
+            ],
             'dependencies': [
               % for dep in getattr(lib, 'deps', []):
               '${dep}',