diff --git a/matlab/write_fort90.m b/matlab/write_fort90.m
index 311229af751207de6b8eba83c4ec182f83418e56..dcf618847f0c1096d9dff895c4c157b4995aa612 100644
--- a/matlab/write_fort90.m
+++ b/matlab/write_fort90.m
@@ -22,8 +22,8 @@ fprintf(fid,['  Ny     = ', num2str(GRID.Ny),'\n']);
 fprintf(fid,['  Ly     = ', num2str(GRID.Ly),'\n']);
 fprintf(fid,['  Nz     = ', num2str(GRID.Nz),'\n']);
 fprintf(fid,['  q0     = ', num2str(GRID.q0),'\n']);
-fprintf(fid,['  shear  = ', num2str(GRID.q0),'\n']);
-fprintf(fid,['  eps    = ', num2str(GRID.q0),'\n']);
+fprintf(fid,['  shear  = ', num2str(GRID.shear),'\n']);
+fprintf(fid,['  eps    = ', num2str(GRID.eps),'\n']);
 fprintf(fid,'/\n');
 
 fprintf(fid,'&OUTPUT_PAR\n');