diff --git a/compiler-rt/lib/gwp_asan/tests/basic.cpp b/compiler-rt/lib/gwp_asan/tests/basic.cpp
index 7d36a2ee1f947..ec2cacc00616c 100644
--- a/compiler-rt/lib/gwp_asan/tests/basic.cpp
+++ b/compiler-rt/lib/gwp_asan/tests/basic.cpp
@@ -8,6 +8,8 @@
 
 #include "gwp_asan/tests/harness.h"
 
+#include <unistd.h>
+
 TEST_F(CustomGuardedPoolAllocator, BasicAllocation) {
   InitNumSlots(1);
   void *Ptr = GPA.allocate(1);
diff --git a/compiler-rt/lib/gwp_asan/tests/never_allocated.cpp b/compiler-rt/lib/gwp_asan/tests/never_allocated.cpp
index 37a4b384e4ac0..6e1ee47d86a53 100644
--- a/compiler-rt/lib/gwp_asan/tests/never_allocated.cpp
+++ b/compiler-rt/lib/gwp_asan/tests/never_allocated.cpp
@@ -12,6 +12,8 @@
 #include "gwp_asan/crash_handler.h"
 #include "gwp_asan/tests/harness.h"
 
+#include <unistd.h>
+
 TEST_P(BacktraceGuardedPoolAllocatorDeathTest, NeverAllocated) {
   size_t PageSize = sysconf(_SC_PAGESIZE);