1 files changed, 2 insertions, 2 deletions
diff --git a/pp.c b/pp.c
index 51facc0730..be6d7233a2 100644
--- a/pp.c
+++ b/pp.c
@@ -3351,7 +3351,7 @@ PP(pp_uc)
 	}
 	else {
 	    (void)SvUPGRADE(TARG, SVt_PV);
-	    SvGROW(TARG, (len * 2) + 1);
+	    SvGROW(TARG, (len * UTF8_MAXLEN_UCLC) + 1);
 	    (void)SvPOK_only(TARG);
 	    d = (U8*)SvPVX(TARG);
 	    send = s + len;
@@ -3418,7 +3418,7 @@ PP(pp_lc)
 	}
 	else {
 	    (void)SvUPGRADE(TARG, SVt_PV);
-	    SvGROW(TARG, (len * 2) + 1);
+	    SvGROW(TARG, (len * UTF8_MAXLEN_UCLC) + 1);
 	    (void)SvPOK_only(TARG);
 	    d = (U8*)SvPVX(TARG);
 	    send = s + len;