diff --git a/SingleSource/UnitTests/CMakeLists.txt b/SingleSource/UnitTests/CMakeLists.txt
--- a/SingleSource/UnitTests/CMakeLists.txt
+++ b/SingleSource/UnitTests/CMakeLists.txt
@@ -14,8 +14,11 @@
 endif()
 
 file(GLOB Source RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} *.c *.cpp)
-if(TARGET_OS STREQUAL "AIX" AND ARCH STREQUAL "PowerPC" AND NOT PPC_IS_PPC64_ENABLED) 
-  list(REMOVE_ITEM Source AtomicOps.c)
+if(TARGET_OS STREQUAL "AIX" AND ARCH STREQUAL "PowerPC")
+  list(REMOVE_ITEM Source 2007-04-25-weak.c)
+  if (NOT PPC_IS_PPC64_ENABLED)
+    list(REMOVE_ITEM Source AtomicOps.c)
+  endif()
 endif()
 if(TARGET_OS STREQUAL "Darwin")
   list(REMOVE_ITEM Source 2007-04-25-weak.c)