diff --git a/cmake/external/onnxruntime_external_deps.cmake b/cmake/external/onnxruntime_external_deps.cmake
index 14e6ed515f..775576a771 100644
--- a/cmake/external/onnxruntime_external_deps.cmake
+++ b/cmake/external/onnxruntime_external_deps.cmake
@@ -46,9 +46,6 @@ if (onnxruntime_BUILD_UNIT_TESTS)
   if (CMAKE_SYSTEM_NAME STREQUAL "Emscripten")
     set(gtest_disable_pthreads ON)
   endif()
-  if (${CMAKE_SYSTEM_NAME} MATCHES "AIX")
-    set(gtest_disable_pthreads ON CACHE BOOL "gtest_disable_pthreads" FORCE)
-  endif()
   set(INSTALL_GTEST OFF CACHE BOOL "" FORCE)
   if (IOS OR ANDROID)
     # on mobile platforms the absl flags class dumps the flag names (assumably for binary size), which breaks passing