diff --git a/src/core/org/luaj/vm/LString.java b/src/core/org/luaj/vm/LString.java
index 2e9a8644..cb968f08 100644
--- a/src/core/org/luaj/vm/LString.java
+++ b/src/core/org/luaj/vm/LString.java
@@ -202,7 +202,7 @@ public class LString extends LValue {
 			return 0;
 		
 		while ( i < imax && j < jmax ) {
-			if ( a[i] != b[i] ) {
+			if ( a[i] != b[j] ) {
 				return ( ( (int)a[i] ) & 0x0FF ) - ( ( (int)b[j] ) & 0x0FF );
 			}
 			i++;
diff --git a/version.properties b/version.properties
index 74dba767..94b40988 100644
--- a/version.properties
+++ b/version.properties
@@ -1 +1 @@
-version: 0.50
+version: 0.51