diff --git a/tools/msi2lmp/src/ReadCarFile.c b/tools/msi2lmp/src/ReadCarFile.c
index c6db96cf92..7932f7d6e2 100644
--- a/tools/msi2lmp/src/ReadCarFile.c
+++ b/tools/msi2lmp/src/ReadCarFile.c
@@ -77,7 +77,6 @@ void ReadCarFile(void)
   double cos_gamma;
   double sin_gamma;
   double cos_beta;
-  double sin_beta;
   double A, B, C;
   double center[3];
   double hmat[6];
@@ -265,7 +264,6 @@ void ReadCarFile(void)
       cos_gamma = cos(pbc[5]*PI_180);
       sin_gamma = sin(pbc[5]*PI_180);
       cos_beta =  cos(pbc[4]*PI_180);
-      sin_beta =  sin(pbc[4]*PI_180);
       if (pflag > 2) {
         printf(" pbc[3] %f pbc[4] %f pbc[5] %f\n", pbc[3] ,pbc[4] ,pbc[5]);
         printf(" cos_alpha %f cos_beta %f cos_gamma %f\n", cos_alpha ,cos_beta ,cos_gamma);