diff --git a/compiler-rt/lib/asan/asan_interceptors.cc b/compiler-rt/lib/asan/asan_interceptors.cc
index 972d2dd18425..ee883cc874ba 100644
--- a/compiler-rt/lib/asan/asan_interceptors.cc
+++ b/compiler-rt/lib/asan/asan_interceptors.cc
@@ -224,6 +224,9 @@ void *WRAP(signal)(int signum, void *handler) {
   return NULL;
 }
 
+extern "C"
+extern int (sigaction)(int signum, const void *act, void *oldact);
+
 extern "C"
 int WRAP(sigaction)(int signum, const void *act, void *oldact) {
   if (!AsanInterceptsSignal(signum)) {
diff --git a/compiler-rt/lib/asan/asan_stack.cc b/compiler-rt/lib/asan/asan_stack.cc
index 8c6320b24106..c332db050e4c 100644
--- a/compiler-rt/lib/asan/asan_stack.cc
+++ b/compiler-rt/lib/asan/asan_stack.cc
@@ -18,8 +18,6 @@
 #include "asan_thread.h"
 #include "asan_thread_registry.h"
 
-#include <string.h>
-
 #if ASAN_USE_SYSINFO == 1
 #include "sysinfo/sysinfo.h"
 #endif