diff --git a/CMakeLists.txt b/CMakeLists.txt
index 27c5058c4..6ccd539fb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -54,7 +54,7 @@ endif()
 # --- find preprocessor
 find_program(FYPP fypp)
 if(NOT FYPP)
-  message(FATAL_ERROR "Preprocessor fypp not found!")
+  message(FATAL_ERROR "Preprocessor fypp not found! Please install fypp following the instructions in https://fypp.readthedocs.io/en/stable/fypp.html#installing")
 endif()
 
 add_subdirectory(src)