diff --git a/pio/CMakeLists.txt b/pio/CMakeLists.txt
index 0b9d0b3..12fd679 100644
--- a/pio/CMakeLists.txt
+++ b/pio/CMakeLists.txt
@@ -9,6 +9,7 @@ if (NOT PICO_NO_HARDWARE)
     add_subdirectory(ir_nec)
     add_subdirectory(logic_analyser)
     add_subdirectory(manchester_encoding)
+    add_subdirectory(onewire)
     add_subdirectory(pio_blink)
     add_subdirectory(pwm)
     add_subdirectory(quadrature_encoder)
diff --git a/pio/onewire/onewire_library/CMakeLists.txt b/pio/onewire/onewire_library/CMakeLists.txt
index cf5a8db..a78b178 100644
--- a/pio/onewire/onewire_library/CMakeLists.txt
+++ b/pio/onewire/onewire_library/CMakeLists.txt
@@ -1,5 +1,5 @@
 add_library(onewire_library INTERFACE)
-target_sources(onewire_library onewire_library.c)
+target_sources(onewire_library INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/onewire_library.c)
 
 # invoke pio_asm to assemble the state machine programs
 #