diff --git a/Alc/backends/pulseaudio.cpp b/Alc/backends/pulseaudio.cpp
index 136d7e75..439450cb 100644
--- a/Alc/backends/pulseaudio.cpp
+++ b/Alc/backends/pulseaudio.cpp
@@ -26,6 +26,7 @@
 #include <array>
 #include <string>
 #include <vector>
+#include <atomic>
 #include <thread>
 #include <algorithm>