diff --git a/g/GSL/GSL-2.3-intel-2017a.eb b/g/GSL/GSL-2.3-intel-2017a.eb
new file mode 100644
index 00000000..23a2fed6
--- /dev/null
+++ b/g/GSL/GSL-2.3-intel-2017a.eb
@@ -0,0 +1,19 @@
+easyblock = 'ConfigureMake'
+
+name = 'GSL'
+version = '2.3'
+
+homepage = 'http://www.gnu.org/software/gsl/'
+description = """The GNU Scientific Library (GSL) is a numerical library for C and C++ programmers.
+ The library provides a wide range of mathematical routines such as random number generators, special functions
+ and least-squares fitting."""
+
+toolchain = {'name': 'intel', 'version': '2017a'}
+toolchainopts = {'unroll': True, 'pic': True}
+
+source_urls = [GNU_SOURCE]
+sources = [SOURCELOWER_TAR_GZ]
+
+configopts = "--with-pic"
+
+moduleclass = 'numlib'
diff --git a/o/OpenBLAS/OpenBLAS-0.2.15-GCC-4.9.3-2.25-LAPACK-3.6.0.eb b/o/OpenBLAS/OpenBLAS-0.2.15-GCC-4.9.3-2.25-LAPACK-3.6.0.eb
index 32dd146e..f9201c43 100644
--- a/o/OpenBLAS/OpenBLAS-0.2.15-GCC-4.9.3-2.25-LAPACK-3.6.0.eb
+++ b/o/OpenBLAS/OpenBLAS-0.2.15-GCC-4.9.3-2.25-LAPACK-3.6.0.eb
@@ -20,6 +20,7 @@ sources = [
     large_src,
     timing_src,
 ]
+
 source_urls = [
     # order matters, trying to download the LAPACK tarball from GitHub causes trouble
     "http://www.netlib.org/lapack/",
@@ -35,7 +36,7 @@ patches = [
 
 skipsteps = ['configure']
 
-buildopts = 'BINARY=64 USE_THREAD=1 CC="$CC" FC="$F77" NO_AFFINITY=1'
+buildopts = 'BINARY=64 USE_THREAD=1 USE_OPENMP=1 CC="$CC" FC="$F77" NO_AFFINITY=1'
 installopts = "USE_THREAD=1 PREFIX=%(installdir)s"
 
 # extensive testing can be enabled by uncommenting the line below