diff --git a/cmake/generic_board.cmake b/cmake/generic_board.cmake
index 9dd917d5..85f59780 100644
--- a/cmake/generic_board.cmake
+++ b/cmake/generic_board.cmake
@@ -21,10 +21,10 @@ if (EXISTS ${PICO_BOARD_HEADER_FILE})
     while(HEADER_FILE_CONTENTS)
         list(POP_FRONT HEADER_FILE_CONTENTS LINE)
         # pico_board_cmake_set(var, value)
-        if (LINE MATCHES "^[ \t\]*pico_board_cmake_set[ \t\]*\\([ \t\]*([a-zA-Z_][a-zA-Z0-9_]*)[ \t\]*,[ \t\]*(.*)[ \t\]*\\)[ \t\]*")
+        if (LINE MATCHES "^[ \t]*pico_board_cmake_set[ \t]*\\([ \t]*([a-zA-Z_][a-zA-Z0-9_]*)[ \t]*,[ \t]*(.*)[ \t]*\\)[ \t]*")
             set("${CMAKE_MATCH_1}" "${CMAKE_MATCH_2}")
         # pico_board_cmake_set_default(var, value)
-        elseif (LINE MATCHES "^[ \t\]*pico_board_cmake_set_default[ \t\]*\\([ \t\]*([a-zA-Z_][a-zA-Z0-9_]*)[ \t\]*,[ \t\]*(.*)[ \t\]*\\)[ \t\]*")
+        elseif (LINE MATCHES "^[ \t]*pico_board_cmake_set_default[ \t]*\\([ \t]*([a-zA-Z_][a-zA-Z0-9_]*)[ \t]*,[ \t]*(.*)[ \t]*\\)[ \t]*")
             if (NOT DEFINED "${CMAKE_MATCH_1}")
                 set("${CMAKE_MATCH_1}" "${CMAKE_MATCH_2}")
             else()
@@ -32,10 +32,10 @@ if (EXISTS ${PICO_BOARD_HEADER_FILE})
             endif()
         # continue to support these for now
         # // pico_cmake_set var = value
-        elseif (LINE MATCHES "^[ \t\]*//[ \t\]*pico_cmake_set[ \t\]*([a-zA-Z_][a-zA-Z0-9_]*)[ \t\]*=[ \t\]*(.*)")
+        elseif (LINE MATCHES "^[ \t]*//[ \t]*pico_cmake_set[ \t]*([a-zA-Z_][a-zA-Z0-9_]*)[ \t]*=[ \t]*(.*)")
             set("${CMAKE_MATCH_1}" "${CMAKE_MATCH_2}")
         # // pico_cmake_set_default var = value
-        elseif (LINE MATCHES "^[ \t\]*//[ \t\]*pico_cmake_set_default[ \t\]*([a-zA-Z_][a-zA-Z0-9_]*)[ \t\]*=[ \t\]*(.*)")
+        elseif (LINE MATCHES "^[ \t]*//[ \t]*pico_cmake_set_default[ \t]*([a-zA-Z_][a-zA-Z0-9_]*)[ \t]*=[ \t]*(.*)")
             if (NOT DEFINED "${CMAKE_MATCH_1}")
                 set("${CMAKE_MATCH_1}" "${CMAKE_MATCH_2}")
             else()