diff --git a/squirrel/CMakeLists.txt b/squirrel/CMakeLists.txt
index af3d9fd1..b9947808 100644
--- a/squirrel/CMakeLists.txt
+++ b/squirrel/CMakeLists.txt
@@ -73,5 +73,5 @@ add_library(SquirrelAPI INTERFACE)
 target_include_directories(SquirrelAPI INTERFACE ${CMAKE_CURRENT_LIST_DIR}/include)
 # Switch to plugin-development mode
 if(PLUGIN_DEVEL)
-	target_compile_definitions(SquirrelAPI PUBLIC SQMOD_PLUGIN_API=1)
+	target_compile_definitions(SquirrelAPI INTERFACE SQMOD_PLUGIN_API=1)
 endif()
\ No newline at end of file