diff --git a/sysdeps/powerpc/powerpc64/le/power10/strlen.S b/sysdeps/powerpc/powerpc64/le/power10/strlen.S
index ec644d5bff..29a5a7d960 100644
--- a/sysdeps/powerpc/powerpc64/le/power10/strlen.S
+++ b/sysdeps/powerpc/powerpc64/le/power10/strlen.S
@@ -31,7 +31,7 @@
 #  define FUNCNAME RAWMEMCHR
 # endif
 # define MCOUNT_NARGS 2
-# define VREG_ZERO v20
+# define VREG_ZERO v17
 # define OFF_START_LOOP 256
 # define RAWMEMCHR_SUBTRACT_VECTORS \
 	vsububm   v4,v4,v18;	    \