diff --git a/Findserial.cmake b/Findserial.cmake
index 6d27e7e..20fccd0 100644
--- a/Findserial.cmake
+++ b/Findserial.cmake
@@ -1,5 +1,5 @@
-find_path(serial_INCLUDE_DIRS serial.h /usr/include/serial 
-          /usr/local/include/serial "$ENV{NAMER_ROOT}")
+find_path(serial_INCLUDE_DIRS serial/serial.h /usr/include 
+          /usr/local/include "$ENV{NAMER_ROOT}")
 
 find_library(serial_LIBRARIES serial /usr/lib /usr/local/lib
              "$ENV{NAMER_ROOT}")