diff --git a/include/AL/al.h b/include/AL/al.h
index 7e596a0b..40b2db1a 100644
--- a/include/AL/al.h
+++ b/include/AL/al.h
@@ -14,7 +14,7 @@ extern "C" {
  #endif
 #else
  #if defined(AL_BUILD_LIBRARY) && defined(HAVE_GCC_VISIBILITY)
-  #define AL_API __attribute__((visibility("default")))
+  #define AL_API __attribute__((visibility("protected")))
  #else
   #define AL_API extern
  #endif
diff --git a/include/AL/alc.h b/include/AL/alc.h
index dac94615..a7e82188 100644
--- a/include/AL/alc.h
+++ b/include/AL/alc.h
@@ -14,7 +14,7 @@ extern "C" {
  #endif
 #else
  #if defined(AL_BUILD_LIBRARY) && defined(HAVE_GCC_VISIBILITY)
-  #define ALC_API __attribute__((visibility("default")))
+  #define ALC_API __attribute__((visibility("protected")))
  #else
   #define ALC_API extern
  #endif