diff --git a/crypto/modes/gcm.c b/crypto/modes/gcm.c
index 153ff17..fe1556d 100644
--- a/crypto/modes/gcm.c
+++ b/crypto/modes/gcm.c
@@ -1003,12 +1003,6 @@
     ctx->ares = 0;
   }
 
-  if (is_endian.little) {
-    ctr = GETU32(ctx->Yi.c + 12);
-  } else {
-    ctr = ctx->Yi.d[3];
-  }
-
   n = ctx->mres;
   if (n) {
     while (n && len) {
@@ -1035,6 +1029,12 @@
   }
 #endif
 
+  if (is_endian.little) {
+    ctr = GETU32(ctx->Yi.c + 12);
+  } else {
+    ctr = ctx->Yi.d[3];
+  }
+
 #if defined(GHASH)
   while (len >= GHASH_CHUNK) {
     (*stream)(in, out, GHASH_CHUNK / 16, key, ctx->Yi.c);