diff --git a/external/librett.cmake b/external/librett.cmake
index 5eca3314ce..0c0ec2312f 100644
--- a/external/librett.cmake
+++ b/external/librett.cmake
@@ -97,6 +97,14 @@ else()
         set(LIBRETT_CMAKE_ARGS "${LIBRETT_CMAKE_ARGS}"
             "-DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE}")
     endif(CMAKE_TOOLCHAIN_FILE)
+    if (DEFINED CMAKE_INTERPROCEDURAL_OPTIMIZATION)
+        set(LIBRETT_CMAKE_ARGS "${LIBRETT_CMAKE_ARGS}"
+                "-DCMAKE_INTERPROCEDURAL_OPTIMIZATION=${CMAKE_INTERPROCEDURAL_OPTIMIZATION}")
+    endif(DEFINED CMAKE_INTERPROCEDURAL_OPTIMIZATION)
+    if (DEFINED CMAKE_INTERPROCEDURAL_OPTIMIZATION_${CMAKE_BUILD_TYPE})
+        set(LIBRETT_CMAKE_ARGS "${LIBRETT_CMAKE_ARGS}"
+                "-DCMAKE_INTERPROCEDURAL_OPTIMIZATION_${CMAKE_BUILD_TYPE}=${CMAKE_INTERPROCEDURAL_OPTIMIZATION_${CMAKE_BUILD_TYPE}}")
+    endif(DEFINED CMAKE_INTERPROCEDURAL_OPTIMIZATION_${CMAKE_BUILD_TYPE})
 
     foreach(lang C CXX CUDA)
         if (DEFINED CMAKE_${lang}_COMPILER_LAUNCHER)
diff --git a/external/umpire.cmake b/external/umpire.cmake
index 5b7a4f4078..ca0495a6f2 100644
--- a/external/umpire.cmake
+++ b/external/umpire.cmake
@@ -151,6 +151,14 @@ else()
             "-DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE}"
             )
     endif(CMAKE_TOOLCHAIN_FILE)
+    if (DEFINED CMAKE_INTERPROCEDURAL_OPTIMIZATION)
+        set(UMPIRE_CMAKE_ARGS "${UMPIRE_CMAKE_ARGS}"
+                "-DCMAKE_INTERPROCEDURAL_OPTIMIZATION=${CMAKE_INTERPROCEDURAL_OPTIMIZATION}")
+    endif(DEFINED CMAKE_INTERPROCEDURAL_OPTIMIZATION)
+    if (DEFINED CMAKE_INTERPROCEDURAL_OPTIMIZATION_${CMAKE_BUILD_TYPE})
+        set(UMPIRE_CMAKE_ARGS "${UMPIRE_CMAKE_ARGS}"
+                "-DCMAKE_INTERPROCEDURAL_OPTIMIZATION_${CMAKE_BUILD_TYPE}=${CMAKE_INTERPROCEDURAL_OPTIMIZATION_${CMAKE_BUILD_TYPE}}")
+    endif(DEFINED CMAKE_INTERPROCEDURAL_OPTIMIZATION_${CMAKE_BUILD_TYPE})
 
     foreach(lang C CXX CUDA)
         if (DEFINED CMAKE_${lang}_COMPILER_LAUNCHER)
diff --git a/src/TiledArray/einsum/tiledarray.h b/src/TiledArray/einsum/tiledarray.h
index cc5ded01cb..e0b93886ee 100644
--- a/src/TiledArray/einsum/tiledarray.h
+++ b/src/TiledArray/einsum/tiledarray.h
@@ -10,6 +10,8 @@
 #include "TiledArray/tiled_range.h"
 #include "TiledArray/tiled_range1.h"
 
+#include <madness/world/thread.h>
+
 namespace TiledArray {
 enum struct DeNest { True, False };
 }