diff --git a/kernel/power/gemv_t.S b/kernel/power/gemv_t.S
index 25a4dd01b..accdad702 100644
--- a/kernel/power/gemv_t.S
+++ b/kernel/power/gemv_t.S
@@ -124,6 +124,11 @@
 #define PREFETCHSIZE_C  16
 #endif
 
+#ifdef POWER3
+#define PREFETCHSIZE_A  16
+#define PREFETCHSIZE_C  16
+#endif
+
 #ifdef POWER4
 #define PREFETCHSIZE_A  48
 #define PREFETCHSIZE_C  16