diff --git a/libs/pbd/mountpoint.cc b/libs/pbd/mountpoint.cc
index df128aaf62a..7a118cbc863 100644
--- a/libs/pbd/mountpoint.cc
+++ b/libs/pbd/mountpoint.cc
@@ -110,6 +110,10 @@ mountpoint (string path)
 
 #else // !HAVE_GETMNTENT
 
+#ifdef __linux__
+#error "getmntent is supported on Linux. Is this a configuration error?"
+#endif
+
 #include <sys/param.h>
 #include <sys/ucred.h>
 #include <sys/mount.h>
diff --git a/libs/pbd/wscript b/libs/pbd/wscript
index 33eaba7b9c6..da46f49cb03 100644
--- a/libs/pbd/wscript
+++ b/libs/pbd/wscript
@@ -122,7 +122,7 @@ def configure(conf):
                 define_name='HAVE_POSIX_MEMALIGN', execute = False, mandatory=False)
     conf.check_cc(
             msg="Checking for function 'getmntent' in mntent.h",
-            fragment = "#include <mntent.h>\n int main(void) { return (int)getmntent(0); }\n",
+            fragment = "#include <mntent.h>\n int main(void) { getmntent(0); }\n",
             define_name='HAVE_GETMNTENT', execute = False, mandatory=False)
     conf.check_cc(
             msg="Checking for function 'localtime_r' in time.h",