diff --git a/src/emu/cpu/m68000/m68kcpu.h b/src/emu/cpu/m68000/m68kcpu.h
index dabd5a7a301..083ef49c612 100644
--- a/src/emu/cpu/m68000/m68kcpu.h
+++ b/src/emu/cpu/m68000/m68kcpu.h
@@ -32,6 +32,11 @@ class m68000_base_device;
 
 #include <limits.h>
 
+#ifdef SDLMAME_SOLARIS
+#undef REG_SP
+#undef REG_PC
+#undef REG_FP
+#endif
 
 /* ======================================================================== */
 /* ==================== ARCHITECTURE-DEPENDANT DEFINES ==================== */
diff --git a/src/emu/luaengine.c b/src/emu/luaengine.c
index 5431e28c341..3ec13f94e6e 100644
--- a/src/emu/luaengine.c
+++ b/src/emu/luaengine.c
@@ -130,6 +130,10 @@ lua_engine::hook::hook()
 	cb = -1;
 }
 
+#ifdef SDLMAME_SOLARIS
+#undef _L
+#endif
+
 void lua_engine::hook::set(lua_State *_L, int idx)
 {
 	if (L)
diff --git a/src/emu/netlist/plists.h b/src/emu/netlist/plists.h
index 9493317b709..c2f758d0d70 100644
--- a/src/emu/netlist/plists.h
+++ b/src/emu/netlist/plists.h
@@ -199,6 +199,10 @@ private:
 // pnamedlist_t: a simple list
 // ----------------------------------------------------------------------------------------
 
+#ifdef SDLMAME_SOLARIS
+#undef _C
+#endif
+
 template <class _C>
 class pnamedlist_t : public plinearlist_t<_C>
 {
diff --git a/src/osd/sdl/sdlprefix.h b/src/osd/sdl/sdlprefix.h
index 9b75948dc9d..9aff11e17f0 100644
--- a/src/osd/sdl/sdlprefix.h
+++ b/src/osd/sdl/sdlprefix.h
@@ -33,7 +33,6 @@
 //#undef _XPG6
 //#undef _XPG5
 //#undef _XPG4_2
-
 //#define _XOPEN_SOURCE
 //#define _XOPEN_VERSION 4
 #elif defined(__irix__) || defined(__sgi)