diff --git a/libs/ardour/ardour/cycles.h b/libs/ardour/ardour/cycles.h
index a0249f8665..01e1d55221 100644
--- a/libs/ardour/ardour/cycles.h
+++ b/libs/ardour/ardour/cycles.h
@@ -43,6 +43,8 @@ typedef uint64_t cycles_t;
 
 extern cycles_t cacheflush_time;
 
+#if defined(__x86_64__)
+
 #define rdtscll(lo, hi)						\
 	__asm__ __volatile__("rdtsc" : "=a" (lo), "=d" (hi))
 
@@ -54,6 +56,20 @@ static inline cycles_t get_cycles (void)
 	return lo;
 }
 
+#else
+
+#define rdtscll(val)				\
+__asm__ __volatile__("rdtsc" : "=A" (val))
+
+static inline cycles_t get_cycles (void)
+{
+	cycles_t ret;
+
+	rdtscll(ret);
+	return ret & 0xffffffff;
+}
+#endif
+
 #elif defined(__powerpc__)
 
 #define CPU_FTR_601			0x00000100