diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0873cad..983345f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -21,7 +21,7 @@ add_subdirectory(temperature)
 add_subdirectory(uart)
 
 # Add pico_stdlib library which aggregates commonly used features
-target_link_libraries(main pico_stdlib temperature uart)
+target_link_libraries(main pico_stdlib hardware_adc temperature uart)
 
 
 # create map/bin/hex/uf2 file in addition to ELF.
diff --git a/temperature/CMakeLists.txt b/temperature/CMakeLists.txt
index 80fd755..2a2eb5f 100644
--- a/temperature/CMakeLists.txt
+++ b/temperature/CMakeLists.txt
@@ -2,4 +2,4 @@ file(GLOB FILES *.c *.h)
 
 add_library(temperature ${FILES})
 
-target_link_libraries(temperature pico_stdlib)
+target_link_libraries(temperature pico_stdlib hardware_adc)