diff --git a/src/sled/debugging/demangle.h b/src/sled/debugging/demangle.h
index 500840e..5379ff2 100644
--- a/src/sled/debugging/demangle.h
+++ b/src/sled/debugging/demangle.h
@@ -2,10 +2,11 @@
 #define SLED_DEBUGGING_DEMANGLE_H
 #pragma once
 
+#include "sled/lang/attributes.h"
 #include <string>
 
 namespace sled {
-bool Demangle(const char *mangled, char *out, size_t out_size);
-std::string DemangleString(const char *mangled);
+bool SLED_NO_INSTRUMENT_FUNCTION Demangle(const char *mangled, char *out, size_t out_size);
+std::string SLED_NO_INSTRUMENT_FUNCTION DemangleString(const char *mangled);
 }// namespace sled
 #endif// SLED_DEBUGGING_DEMANGLE_H
diff --git a/src/sled/debugging/symbolize.cc b/src/sled/debugging/symbolize.cc
index 14f353e..6d70f7c 100644
--- a/src/sled/debugging/symbolize.cc
+++ b/src/sled/debugging/symbolize.cc
@@ -1,4 +1,5 @@
 #include "sled/debugging/symbolize.h"
+#include "sled/lang/attributes.h"
 
 #ifdef _WIN32
 void
diff --git a/src/sled/debugging/symbolize_darwin.inc b/src/sled/debugging/symbolize_darwin.inc
index 7578c87..cbe4ca4 100644
--- a/src/sled/debugging/symbolize_darwin.inc
+++ b/src/sled/debugging/symbolize_darwin.inc
@@ -10,6 +10,7 @@ namespace sled {
 namespace {
 
 static std::string
+SLED_NO_INSTRUMENT_FUNCTION
 GetSymbolString(const std::string &backtrace_line)
 {
     // Example Backtrace lines:
@@ -40,10 +41,12 @@ GetSymbolString(const std::string &backtrace_line)
 }// namespace
 
 void
+SLED_NO_INSTRUMENT_FUNCTION
 InitializeSymbolizer(const char *argv0)
 {}
 
 bool
+SLED_NO_INSTRUMENT_FUNCTION
 Symbolize(const void *pc, char *out, int out_size)
 {
     if (out_size <= 0 || pc == nullptr) {
diff --git a/src/sled/lang/attributes.h b/src/sled/lang/attributes.h
index d786595..42fe757 100644
--- a/src/sled/lang/attributes.h
+++ b/src/sled/lang/attributes.h
@@ -56,4 +56,6 @@
 #define SLED_UNLOCK_FUNCTION(...) SLED_THREAD_ANNOTATION_ATTRIBUTE__(unlock_function(__VA_ARGS__))
 #define SLED_ASSERT_EXCLUSIVE_LOCK(...) SLED_THREAD_ANNOTATION_ATTRIBUTE__(assert_exclusive_lock(__VA_ARGS__))
 
+#define SLED_NO_INSTRUMENT_FUNCTION SLED_THREAD_ANNOTATION_ATTRIBUTE__(no_instrument_function)
+
 #endif//  SLED_LANG_ATTRIBUTES_H