diff --git a/kernel/power/gemv_n.S b/kernel/power/gemv_n.S
index abc61b62e..9c6f87639 100644
--- a/kernel/power/gemv_n.S
+++ b/kernel/power/gemv_n.S
@@ -159,6 +159,11 @@
 #define PREFETCHSIZE_C  16
 #endif
 
+#ifdef POWER3
+#define PREFETCHSIZE_A  16
+#define PREFETCHSIZE_C  16
+#endif
+
 #ifdef POWER4
 #define PREFETCHSIZE_A  16
 #define PREFETCHSIZE_C  16