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-rw-r--r--src/emu/netlist/nl_config.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/emu/netlist/nl_config.h b/src/emu/netlist/nl_config.h
index 4d93e669f5f..963d76cd3e3 100644
--- a/src/emu/netlist/nl_config.h
+++ b/src/emu/netlist/nl_config.h
@@ -60,7 +60,11 @@ typedef UINT8 netlist_sig_t;
// General Macros
//============================================================
+#if defined(_OPENMP)
#define HAS_OPENMP ( _OPENMP >= 200805 )
+#else
+#define HAS_OPENMP (0)
+#endif
// prevent implicit copying
#define NETLIST_PREVENT_COPYING(_name) \