Update README.md

markaren · web-flow · commit fd4ef255f693 · 2024-08-30T10:50:51.000+02:00
diff --git a/README.md b/README.md
@@ -18,6 +18,7 @@ Build it as any other regular CMake project.
 #### Usage with CMake FetchContent
 
 ```cmake
+include(FetchContent)
 set(SERIAL_BUILD_EXAMPLES OFF)
 FetchContent_Declare(
         serial
