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-rw-r--r--var/spack/repos/builtin/packages/fftw/package.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/var/spack/repos/builtin/packages/fftw/package.py b/var/spack/repos/builtin/packages/fftw/package.py
index 008939ece8..4ffc787594 100644
--- a/var/spack/repos/builtin/packages/fftw/package.py
+++ b/var/spack/repos/builtin/packages/fftw/package.py
@@ -57,7 +57,7 @@ class Fftw(Package):
if '+openmp' in spec:
# Note: Apple's Clang does not support OpenMP.
if spec.satisfies('%clang'):
- ver = '%s' % self.compiler.version
+ ver = str(self.compiler.version)
if ver.endswith('-apple'):
raise InstallError("Apple's clang does not support OpenMP")
options.append('--enable-openmp')