diff --git a/lldb/tools/lldb-dap/JSONUtils.cpp b/lldb/tools/lldb-dap/JSONUtils.cpp
index 663ae33ed8317..a7300abae0eac 100644
--- a/lldb/tools/lldb-dap/JSONUtils.cpp
+++ b/lldb/tools/lldb-dap/JSONUtils.cpp
@@ -31,6 +31,7 @@
 #include "lldb/API/SBThread.h"
 #include "lldb/API/SBType.h"
 #include "lldb/API/SBValue.h"
+#include "lldb/Host/PosixApi.h" // IWYU pragma: keep
 #include "lldb/lldb-defines.h"
 #include "lldb/lldb-enumerations.h"
 #include "lldb/lldb-types.h"