diff --git a/src/flib/CMakeLists.txt b/src/flib/CMakeLists.txt
index 42b70edb789..b5fbdd3cc37 100644
--- a/src/flib/CMakeLists.txt
+++ b/src/flib/CMakeLists.txt
@@ -38,6 +38,7 @@ endif ()
 
 # Include flib source and binary directories (for Fortran modules)
 target_include_directories (piof
+  PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}
   PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}
   PUBLIC ${CMAKE_CURRENT_BINARY_DIR})