diff --git a/sais/gsa/gsaca.go b/sais/gsa/gsaca.go
index 509e4524d..fe8facdbe 100644
--- a/sais/gsa/gsaca.go
+++ b/sais/gsa/gsaca.go
@@ -2,7 +2,7 @@ package gsa
 
 /*
 #include "gsacak.h"
-#cgo CFLAGS: -DTERMINATOR=0 -DM64=1 -Dm64=1
+#cgo CFLAGS: -DTERMINATOR=0 -DM64=1 -Dm64=1 -std=c99
 */
 import "C"
 import (
diff --git a/sais/utils.c b/sais/utils.c
index b0058f13c..85cee183f 100644
--- a/sais/utils.c
+++ b/sais/utils.c
@@ -2,8 +2,7 @@
 
 int lcp_kasai(const unsigned char *T, int *SA, int *LCP, int *FTR, int *INV, int sa_size, int n)
 {
-
-    for (int i = 0, j = 0; i < sa_size; i++)
+    for (int i = 0, j = 0;; i < sa_size; i++)
     {
         if ((SA[i] & 1) == 0)
             FTR[j++] = SA[i] >> 1;