diff --git a/CMakeLists.txt b/CMakeLists.txt
index 93f3ff6..df300af 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -74,6 +74,8 @@ endif()
 
 add_definitions(-DLIBRESSL_INTERNAL)
 add_definitions(-DOPENSSL_NO_HW_PADLOCK)
+add_definitions(-D__BEGIN_HIDDEN_DECLS=)
+add_definitions(-D__END_HIDDEN_DECLS=)
 
 set(CMAKE_POSITION_INDEPENDENT_CODE true)
 
diff --git a/Makefile.am.common b/Makefile.am.common
index 49019ec..87aa807 100644
--- a/Makefile.am.common
+++ b/Makefile.am.common
@@ -1,2 +1,3 @@
 AM_CFLAGS =
 AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_srcdir)/include/compat -DLIBRESSL_INTERNAL
+AM_CPPFLAGS += -D__BEGIN_HIDDEN_DECLS= -D__END_HIDDEN_DECLS=