diff --git a/source/eventcore/drivers/posix/processes.d b/source/eventcore/drivers/posix/processes.d
index 17e660f..2dfca88 100644
--- a/source/eventcore/drivers/posix/processes.d
+++ b/source/eventcore/drivers/posix/processes.d
@@ -8,6 +8,7 @@ import eventcore.internal.utils : nogc_assert, print;
 
 import std.algorithm.comparison : among;
 import std.variant : visit;
+import std.stdint;
 
 private struct ProcessInfo {
     bool exited = true;