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-rw-r--r--crypto/src/math/ec/ECAlgorithms.cs4
1 files changed, 2 insertions, 2 deletions
diff --git a/crypto/src/math/ec/ECAlgorithms.cs b/crypto/src/math/ec/ECAlgorithms.cs
index b0b75e908..c44df0beb 100644
--- a/crypto/src/math/ec/ECAlgorithms.cs
+++ b/crypto/src/math/ec/ECAlgorithms.cs
@@ -165,8 +165,8 @@ namespace Org.BouncyCastle.Math.EC
 
             for (int i = len - 1; i >= 0; --i)
             {
-                int wiP = i < wnafP.Length ? (sbyte)wnafP[i] : 0;
-                int wiQ = i < wnafQ.Length ? (sbyte)wnafQ[i] : 0;
+                int wiP = i < wnafP.Length ? (int)(sbyte)wnafP[i] : 0;
+                int wiQ = i < wnafQ.Length ? (int)(sbyte)wnafQ[i] : 0;
 
                 if ((wiP | wiQ) == 0)
                 {