diff --git a/libutils/RefBase.cpp b/libutils/RefBase.cpp
index 99fefee..4ddac3d 100644
--- a/libutils/RefBase.cpp
+++ b/libutils/RefBase.cpp
@@ -50,7 +50,7 @@
 // log all reference counting operations
 #define PRINT_REFS 0
 
-#if !defined(_WIN32) && !defined(__APPLE__)
+#if defined(__linux__)
 // CallStack is only supported on linux type platforms.
 #define CALLSTACK_ENABLED 1
 #else
diff --git a/libutils/include/utils/Errors.h b/libutils/include/utils/Errors.h
index d14d223..22fb36d 100644
--- a/libutils/include/utils/Errors.h
+++ b/libutils/include/utils/Errors.h
@@ -34,15 +34,13 @@
  * All error codes are negative values.
  */
 
-// Win32 #defines NO_ERROR as well.  It has the same value, so there's no
-// real conflict, though it's a bit awkward.
-#ifdef _WIN32
-# undef NO_ERROR
-#endif
-
 enum {
     OK                = 0,    // Preferred constant for checking success.
+#ifndef NO_ERROR
+    // Win32 #defines NO_ERROR as well.  It has the same value, so there's no
+    // real conflict, though it's a bit awkward.
     NO_ERROR          = OK,   // Deprecated synonym for `OK`. Prefer `OK` because it doesn't conflict with Windows.
+#endif
 
     UNKNOWN_ERROR       = (-2147483647-1), // INT32_MIN value
 
@@ -76,10 +74,4 @@
 // Human readable name of error
 std::string statusToString(status_t status);
 
-// Restore define; enumeration is in "android" namespace, so the value defined
-// there won't work for Win32 code in a different namespace.
-#ifdef _WIN32
-# define NO_ERROR 0L
-#endif
-
 }  // namespace android