diff --git a/lldb/unittests/Platform/PlatformMacOSXTest.cpp b/lldb/unittests/Platform/PlatformMacOSXTest.cpp
index e35489a47d87e..123fdbc39d672 100644
--- a/lldb/unittests/Platform/PlatformMacOSXTest.cpp
+++ b/lldb/unittests/Platform/PlatformMacOSXTest.cpp
@@ -21,6 +21,7 @@ class PlatformMacOSXTest : public ::testing::Test {
   SubsystemRAII<FileSystem, HostInfo, PlatformMacOSX> subsystems;
 };
 
+#ifdef __APPLE__
 static bool containsArch(const std::vector<ArchSpec> &archs,
                          const ArchSpec &arch) {
   return std::find_if(archs.begin(), archs.end(), [&](const ArchSpec &other) {
@@ -50,3 +51,4 @@ TEST_F(PlatformMacOSXTest, TestGetSupportedArchitectures) {
                             arm64_ios_arch));
 #endif
 }
+#endif