diff --git a/src/switch_utils.c b/src/switch_utils.c
index 3b9ad79c2f..ea6a0a2dfa 100644
--- a/src/switch_utils.c
+++ b/src/switch_utils.c
@@ -466,7 +466,7 @@ SWITCH_DECLARE(switch_status_t) switch_b64_encode(unsigned char *in, switch_size
 		b = (b << 8) + in[x];
 		l += 8;
 
-		if ((X % 1024) == 0) {
+		if ((x % 1024) == 0) {
 			switch_cond_next(); /* give other processes/threads a chance */
 		}
 		while (l >= 6) {