diff --git a/kernel/power/zgemv_n.S b/kernel/power/zgemv_n.S
index 708f1318d..48f49f97b 100644
--- a/kernel/power/zgemv_n.S
+++ b/kernel/power/zgemv_n.S
@@ -155,6 +155,11 @@
 #define PREFETCHSIZE_C  16
 #endif
 
+#ifdef POWER3
+#define PREFETCHSIZE_A  34
+#define PREFETCHSIZE_C  16
+#endif
+
 #ifdef POWER4
 #define PREFETCHSIZE_A  34
 #define PREFETCHSIZE_C  16