Index: runtime/src/kmp.h
===================================================================
--- runtime/src/kmp.h
+++ runtime/src/kmp.h
@@ -96,6 +96,12 @@
 #ifndef HWLOC_OBJ_PACKAGE
 #define HWLOC_OBJ_PACKAGE HWLOC_OBJ_SOCKET
 #endif
+#if HWLOC_API_VERSION >= 0x00020000
+// hwloc 2.0 changed type of depth of object from unsigned to int
+typedef int kmp_hwloc_depth_t;
+#else
+typedef unsigned int kmp_hwloc_depth_t;
+#endif
 #endif
 
 #if KMP_ARCH_X86 || KMP_ARCH_X86_64
Index: runtime/src/kmp_affinity.cpp
===================================================================
--- runtime/src/kmp_affinity.cpp
+++ runtime/src/kmp_affinity.cpp
@@ -457,7 +457,8 @@
 }
 
 static int __kmp_hwloc_count_children_by_depth(hwloc_topology_t t,
-                                               hwloc_obj_t o, unsigned depth,
+                                               hwloc_obj_t o,
+                                               kmp_hwloc_depth_t depth,
                                                hwloc_obj_t *f) {
   if (o->depth == depth) {
     if (*f == NULL)