diff --git a/autospec/specfiles.py b/autospec/specfiles.py
index cf9e6b0..2979b6c 100644
--- a/autospec/specfiles.py
+++ b/autospec/specfiles.py
@@ -436,7 +436,7 @@ class Specfile(object):
             cmake_type = "Ninja"
         else:
             cmake_type = "Unix Makefiles"
-        cmake_string = f"cmake -G {cmake_type} -DCMAKE_INSTALL_PREFIX=$MPI_ROOT -DCMAKE_INSTALL_SBINDIR=$MPI_BIN \\\n" \
+        cmake_string = f"cmake -G '{cmake_type}' -DCMAKE_INSTALL_PREFIX=$MPI_ROOT -DCMAKE_INSTALL_SBINDIR=$MPI_BIN \\\n" \
                        '-DCMAKE_INSTALL_LIBDIR=$MPI_LIB -DCMAKE_INSTALL_INCLUDEDIR=$MPI_INCLUDE -DLIB_INSTALL_DIR=$MPI_LIB \\\n' \
                        '-DBUILD_SHARED_LIBS:BOOL=ON -DLIB_SUFFIX=64 \\\n' \
                        '-DCMAKE_AR=/usr/bin/gcc-ar -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_RANLIB=/usr/bin/gcc-ranlib \\\n'