diff --git a/Eigen/src/LU/arch/Inverse_SSE.h b/Eigen/src/LU/arch/Inverse_SSE.h
index 176c349ce..4c6153f0a 100644
--- a/Eigen/src/LU/arch/Inverse_SSE.h
+++ b/Eigen/src/LU/arch/Inverse_SSE.h
@@ -55,7 +55,7 @@ struct compute_inverse_size4<Architecture::SSE, float, MatrixType, ResultType>
   
   static void run(const MatrixType& matrix, ResultType& result)
   {
-    EIGEN_ALIGN16 const  int _Sign_PNNP[4] = { 0x00000000, 0x80000000, 0x80000000, 0x00000000 };
+    EIGEN_ALIGN16 const unsigned int _Sign_PNNP[4] = { 0x00000000, 0x80000000, 0x80000000, 0x00000000 };
 
     // Load the full matrix into registers
     __m128 _L1 = matrix.template packet<MatrixAlignment>( 0);