diff --git a/CMakeLists.txt b/CMakeLists.txt
index 11a25580..25909437 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -343,7 +343,9 @@ if(APPLE OR CMAKE_SYSTEM_NAME MATCHES "DragonFly|FreeBSD|Linux|NetBSD|OpenBSD")
 endif()
 
 add_library(uv SHARED ${uv_sources})
-target_compile_definitions(uv PRIVATE ${uv_defines} BUILDING_UV_SHARED=1)
+target_compile_definitions(uv
+                           INTERFACE USING_UV_SHARED=1
+                           PRIVATE ${uv_defines} BUILDING_UV_SHARED=1)
 target_compile_options(uv PRIVATE ${uv_cflags})
 target_include_directories(uv PUBLIC include PRIVATE src)
 target_link_libraries(uv ${uv_libraries})
diff --git a/include/uv.h b/include/uv.h
index ee94397a..ee45bcae 100644
--- a/include/uv.h
+++ b/include/uv.h
@@ -27,6 +27,10 @@
 extern "C" {
 #endif
 
+#if defined(BUILDING_UV_SHARED) && defined(USING_UV_SHARED)
+#error "Define either BUILDING_UV_SHARED or USING_UV_SHARED, not both."
+#endif
+
 #ifdef _WIN32
   /* Windows - set up dll import/export decorators. */
 # if defined(BUILDING_UV_SHARED)