diff --git a/third_party/ijar/BUILD.gn b/third_party/ijar/BUILD.gn
index 8dc9fe21cf8..49c50e6636f 100644
--- a/third_party/ijar/BUILD.gn
+++ b/third_party/ijar/BUILD.gn
@@ -4,7 +4,7 @@
 
 # A tool that removes all non-interface-specific parts from a .jar file.
 
-if (is_linux || is_chromeos) {
+if (is_linux || is_chromeos || is_mac) {
   config("ijar_compiler_flags") {
     if (is_clang) {
       cflags = [
diff --git a/third_party/jdk/BUILD.gn b/third_party/jdk/BUILD.gn
index e003eef94d7..ec49922942b 100644
--- a/third_party/jdk/BUILD.gn
+++ b/third_party/jdk/BUILD.gn
@@ -3,10 +3,12 @@
 # found in the LICENSE file.
 
 config("jdk") {
-  include_dirs = [
-    "current/include",
-    "current/include/linux",
-  ]
+  include_dirs = [ "current/include" ]
+  if (host_os == "mac") {
+    include_dirs += [ "current/include/darwin" ]
+  } else {
+    include_dirs += [ "current/include/linux" ]
+  }
 }
 
 group("java_data") {