diff --git a/cgnslib.spec b/cgnslib.spec
index a644884..8f23016 100644
--- a/cgnslib.spec
+++ b/cgnslib.spec
@@ -10,8 +10,8 @@ BuildRequires:  gcc-gfortran
 BuildRequires:  hdf5-devel
 BuildRequires:  mesa-libGL-devel
 BuildRequires:  mesa-libGLU-devel
-BuildRequires:  tcl
-BuildRequires:  tk
+BuildRequires:  tcl-devel
+BuildRequires:  tk-devel
 BuildRequires:  zlib-devel
 #Requires:       hdf5 = %{_hdf5_version}