diff --git a/SConstruct b/SConstruct
index 33e0ff3..cf39fd9 100644
--- a/SConstruct
+++ b/SConstruct
@@ -319,7 +319,7 @@ for var in import_env:
         envs[var] = os.environ[var]
 envs["GPSD_HOME"] = os.getcwd()
 
-env = Environment(tools=["default", "tar", "textfile"], options=opts, ENV=envs)
+env = Environment(tools=["default", "tar", "textfile"], options=opts, ENV=envs, CPPPATH=".")
 
 #  Minimal build turns off every option not set on the command line,
 if ARGUMENTS.get('minimal'):