--- /tmp/fpatchflight/flightgear-2020.3.3/3rdparty/hts_engine_API/lib/HTS_misc.c
+++ /tmp/flightgear-2020.3.3/3rdparty/hts_engine_API/lib/HTS_misc.c
@@ -284,8 +284,10 @@
       fgetpos((FILE *) fp->pointer, &pos);
 #if defined(_WIN32) || defined(__CYGWIN__) || defined(__APPLE__) || defined(__FreeBSD__) || defined(__ANDROID__) || defined(__OpenBSD__)
       return (size_t) pos;
-#else
+#elif defined(__GLIBC__)
       return (size_t) pos.__pos;
+#else
+      return (size_t) ftell(fp->pointer);
 #endif                          /* _WIN32 || __CYGWIN__ || __APPLE__ || __ANDROID__ */
    } else if (fp->type == HTS_DATA) {
       HTS_Data *d = (HTS_Data *) fp->pointer;