--- /tmp/fpatchflight/flightgear-2020.3.3/3rdparty/iaxclient/lib/libiax2/src/iax.c
+++ /tmp/flightgear-2020.3.3/3rdparty/iaxclient/lib/libiax2/src/iax.c
@@ -75,9 +75,6 @@
 // FlightGear: Modified to include FreeBSD
 #if !defined(MACOSX) && !defined(__OpenBSD__) && !defined(__FreeBSD__)
 #include <malloc.h>
-#if !defined(SOLARIS)
-#include <error.h>
-#endif
 #endif
 
 #endif // #if defined(WIN32)  ||  defined(_WIN32_WCE) yes or no