diff --git a/libartbase/base/utils.h b/libartbase/base/utils.h
index 6fc537a..4bcb915 100644
--- a/libartbase/base/utils.h
+++ b/libartbase/base/utils.h
@@ -159,6 +159,9 @@
 // following accesses repopulate the memory or return zero.
 bool IsAddressKnownBackedByFileOrShared(const void* addr);
 
+// Returns the number of threads running.
+int GetTaskCount();
+
 }  // namespace art
 
 #endif  // ART_LIBARTBASE_BASE_UTILS_H_