diff --git a/src/external/libBNMR/libLineProfile/CMakeLists.txt b/src/external/libBNMR/libLineProfile/CMakeLists.txt
index 27b35935..3663db0e 100644
--- a/src/external/libBNMR/libLineProfile/CMakeLists.txt
+++ b/src/external/libBNMR/libLineProfile/CMakeLists.txt
@@ -21,6 +21,7 @@ add_library(LineProfile SHARED
 #--- make sure that the include directory is found ----------------------------
 target_include_directories(
   LineProfile BEFORE PRIVATE 
+    $<BUILD_INTERFACE:${Boost_INCLUDE_DIRS}>
     $<BUILD_INTERFACE:${MUSRFIT_INC}>
     $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
 )