diff --git a/numerical_methods/qr_eigen_values.c b/numerical_methods/qr_eigen_values.c
index 442264d5..1e61a6c2 100644
--- a/numerical_methods/qr_eigen_values.c
+++ b/numerical_methods/qr_eigen_values.c
@@ -82,9 +82,9 @@ int main(int argc, char **argv)
 
     int i, rows = mat_size, columns = mat_size;
 
-    double **A = (double **)malloc(sizeof(double) * mat_size);
-    double **R = (double **)malloc(sizeof(double) * mat_size);
-    double **Q = (double **)malloc(sizeof(double) * mat_size);
+    double **A = (double **)malloc(sizeof(double *) * mat_size);
+    double **R = (double **)malloc(sizeof(double *) * mat_size);
+    double **Q = (double **)malloc(sizeof(double *) * mat_size);
 
     /* number of eigen values = matrix size */
     double *eigen_vals = (double *)malloc(sizeof(double) * mat_size);