--- kstars-4.4.65.orig/kstars/kstars/skycomponents/starcomponent.cpp
+++ kstars-4.4.65/kstars/kstars/skycomponents/starcomponent.cpp
@@ -40,6 +40,10 @@
 #include <sys/endian.h>
 #define bswap_16(x) bswap16(x)
 #define bswap_32(x) bswap32(x)
+#elif defined(__sun)
+#include <sys/byteorder.h>
+#define bswap_16(x) BSWAP_16(x)
+#define bswap_32(x) BSWAP_32(x)
 #else
 #include "byteorder.h"
 #endif