diff --git a/openmp/libomptarget/plugins-nextgen/common/PluginInterface/CMakeLists.txt b/openmp/libomptarget/plugins-nextgen/common/PluginInterface/CMakeLists.txt
--- a/openmp/libomptarget/plugins-nextgen/common/PluginInterface/CMakeLists.txt
+++ b/openmp/libomptarget/plugins-nextgen/common/PluginInterface/CMakeLists.txt
@@ -19,7 +19,9 @@
 # Define the DEBUG_PREFIX.
 add_definitions(-DDEBUG_PREFIX="PluginInterface")
 
-set_property(TARGET PluginInterface PROPERTY POSITION_INDEPENDENT_CODE ON)
+set_target_properties(PluginInterface PROPERTIES
+  POSITION_INDEPENDENT_CODE ON
+  CXX_VISIBILITY_PRESET protected)
 llvm_update_compile_flags(PluginInterface)
 set(LINK_LLVM_LIBS LLVMSupport)
 if (LLVM_LINK_LLVM_DYLIB)