diff --git a/scripts/build.sh b/scripts/build.sh
index 95d18e0..4589b2d 100644
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -226,6 +226,10 @@ for lib in "$OF_DIR/libs"/*/; do
     OF_EXTRA_INCLUDES="$OF_EXTRA_INCLUDES -I$subdir"
   done < <(find "$incdir" -type d)
 done
+# ofxPiMapper addon subdirectories (Sources/, Surfaces/, Textures/, etc.)
+while IFS= read -r subdir; do
+  OF_EXTRA_INCLUDES="$OF_EXTRA_INCLUDES -I$subdir"
+done < <(find "$ADDON_DIR/src" -type d)
 
 make clean 2>/dev/null || true
 make -j1 \