diff --git a/hw/xfree86/x86emu/decode.c b/hw/xfree86/x86emu/decode.c
index 12f8fb84b..08a07b1bb 100644
--- a/hw/xfree86/x86emu/decode.c
+++ b/hw/xfree86/x86emu/decode.c
@@ -38,6 +38,16 @@
 ****************************************************************************/
 
 #include <stdlib.h>
+
+#if defined(__sun) && defined(CS) /* avoid conflicts with Solaris sys/regset.h */
+# undef CS
+# undef DS
+# undef SS
+# undef ES
+# undef FS
+# undef GS
+#endif
+
 #include "x86emu/x86emui.h"
 
 /*----------------------------- Implementation ----------------------------*/
diff --git a/hw/xfree86/x86emu/x86emu/regs.h b/hw/xfree86/x86emu/x86emu/regs.h
index 6bd061166..2ecafa047 100644
--- a/hw/xfree86/x86emu/x86emu/regs.h
+++ b/hw/xfree86/x86emu/x86emu/regs.h
@@ -112,6 +112,15 @@ struct i386_special_regs {
  * CS, DS, ES, SS.
  */
 
+#if defined(__sun) && defined(CS) /* avoid conflicts with Solaris sys/regset.h */
+# undef CS
+# undef DS
+# undef SS
+# undef ES
+# undef FS
+# undef GS
+#endif
+
 struct i386_segment_regs {
     u16 CS, DS, SS, ES, FS, GS;
 };
diff --git a/hw/xfree86/x86emu/x86emu/x86emui.h b/hw/xfree86/x86emu/x86emu/x86emui.h
index f11dc102f..5e20d9705 100644
--- a/hw/xfree86/x86emu/x86emu/x86emui.h
+++ b/hw/xfree86/x86emu/x86emu/x86emui.h
@@ -73,7 +73,17 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#endif
+/* avoid conflicts with Solaris sys/regset.h */
+# if defined(__sun) && defined(CS)
+#  undef CS
+#  undef DS
+#  undef SS
+#  undef ES
+#  undef FS
+#  undef GS
+# endif
+#endif /* NO_SYS_HEADERS */
+
 /*--------------------------- Inline Functions ----------------------------*/
 
 #ifdef  __cplusplus
diff --git a/record/record.c b/record/record.c
index f3a26a732..2c70460e8 100644
--- a/record/record.c
+++ b/record/record.c
@@ -1393,6 +1393,10 @@ typedef struct {
     short first, last;          /* if for extension, major opcode interval */
 } SetInfoRec, *SetInfoPtr;
 
+#if defined(ERR) && defined(__sun)
+#undef ERR /* Avoid conflict with Solaris <sys/regset.h> */
+#endif
+
 /* These constant are used to index into an array of SetInfoRec. */
 enum { REQ,                     /* set info for requests */
     REP,                        /* set info for replies */