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-rw-r--r--src/lib/util/delegate.cpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/lib/util/delegate.cpp b/src/lib/util/delegate.cpp
index 3ccb7294ee4..6f73c925da1 100644
--- a/src/lib/util/delegate.cpp
+++ b/src/lib/util/delegate.cpp
@@ -29,7 +29,9 @@
// other platforms using this convention include:
// * AIX, Classic MacOS and WinNT on 32-bit POWER/PowerPC
// * pretty much anything on Itanium
-#if (defined(__ppc64__) || (defined(__PPC64__))) && !defined(__APPLE__)
+// separately, on some architectures, function descriptors are stored in
+// vtables directly
+#if defined(__ia64__)
#define MAME_DELEGATE_VT_DESCRIPTOR 1
#endif
#ifndef MAME_DELEGATE_VT_DESCRIPTOR