diff --git a/base/allocator/partition_allocator/pcscan.cc b/base/allocator/partition_allocator/pcscan.cc
index b8d96e32d..a802a1fae 100644
--- a/base/allocator/partition_allocator/pcscan.cc
+++ b/base/allocator/partition_allocator/pcscan.cc
@@ -7,6 +7,7 @@
 #include <algorithm>
 #include <map>
 #include <mutex>
+#include <condition_variable>
 #include <numeric>
 #include <set>
 #include <thread>