diff --git a/ceph.spec b/ceph.spec
index 33c23ca..6143f9a 100644
--- a/ceph.spec
+++ b/ceph.spec
@@ -1240,7 +1240,7 @@ export CXXFLAGS=$(echo $RPM_OPT_FLAGS | sed -e 's/-Wp,-D_FORTIFY_SOURCE=2//g')
 %endif
 
 # Parallel build settings ...
-CEPH_MFLAGS_JOBS="-j32"
+CEPH_MFLAGS_JOBS="-j16"
 CEPH_SMP_NCPUS=$(echo "$CEPH_MFLAGS_JOBS" | sed 's/-j//')
 %if 0%{?__isa_bits} == 32
 # 32-bit builds can use 3G memory max, which is not enough even for -j2