diff --git a/parallel-rsp/CMakeLists.txt b/parallel-rsp/CMakeLists.txt
index ed31ef5..a924121 100644
--- a/parallel-rsp/CMakeLists.txt
+++ b/parallel-rsp/CMakeLists.txt
@@ -67,6 +67,9 @@ add_library(${NAME_PLUGIN_SIMPLE64} SHARED
 		arch/simd/rsp/vxor.h
 		arch/simd/rsp/vmulm.h)
 
+set_property(TARGET ${NAME_PLUGIN_SIMPLE64} PROPERTY C_VISIBILITY_PRESET hidden)
+set_property(TARGET ${NAME_PLUGIN_SIMPLE64} PROPERTY CXX_VISIBILITY_PRESET hidden)
+set_property(TARGET ${NAME_PLUGIN_SIMPLE64} PROPERTY VISIBILITY_INLINES_HIDDEN ON)
 set_target_properties(${NAME_PLUGIN_SIMPLE64} PROPERTIES PREFIX "")
 target_include_directories(${NAME_PLUGIN_SIMPLE64} PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
 target_include_directories(${NAME_PLUGIN_SIMPLE64} PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/arch/simd/rsp)
@@ -92,6 +95,9 @@ if (PARALLEL_RSP_BAKED_LIGHTNING)
 		target_sources(lightning PRIVATE win32/mman/sys/mman.c)
 		target_include_directories(lightning PRIVATE win32/mman)
 	endif()
+	set_property(TARGET lightning PROPERTY C_VISIBILITY_PRESET hidden)
+	set_property(TARGET lightning PROPERTY CXX_VISIBILITY_PRESET hidden)
+	set_property(TARGET lightning PROPERTY VISIBILITY_INLINES_HIDDEN ON)
 	target_compile_options(lightning PRIVATE -march=x86-64-v3 -DHAVE_MMAP)
 	target_link_options(lightning PRIVATE -march=x86-64-v3 -DHAVE_MMAP)
 endif()