diff --git a/configure.ac b/configure.ac
index 0af57e34a..adb73231c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -619,13 +619,17 @@ AS_CASE(["$host_os"],
         ],
 dnl As g313-posix.c has a hard dependency on linux/types.h
 dnl via linradio/wrg313api.h, disable compilation on other POSIX.
-        [ *linux-gnu ], [
+dnl (Certain systems have extra characters following "-gnu" such as
+dnl the Raspberry Pi which is "linux-gnueabihf"; presume that "linux-gnu"
+dnl is a sufficient test.)
+        [ *linux-gnu* ], [
              AM_CONDITIONAL(G313_LINUX_GNU, true)
              AM_CONDITIONAL(G313_WINDOWS, false)
         ],
         [
              AM_CONDITIONAL(G313_LINUX_GNU, false)
              AM_CONDITIONAL(G313_WINDOWS, false)
+             AC_DEFINE([OTHER_POSIX], [1], [Compilation on POSIX other than Linux])
         ])
 
 dnl If libdl is present, check for its header file.
diff --git a/winradio/winradio.c b/winradio/winradio.c
index a4bd38395..24411c9f0 100644
--- a/winradio/winradio.c
+++ b/winradio/winradio.c
@@ -252,11 +252,9 @@ DECLARE_INITRIG_BACKEND(winradio)
 #endif
 #endif
 
-	/* Not available on MS Windows */
-#ifndef _WIN32
-#ifndef __CYGWIN__
+	/* Available on Linux and MS Windows */
+#ifndef OTHER_POSIX
 	rig_register(&g313_caps);
-#endif
 #endif
 
 	return RIG_OK;