diff --git a/.travis.yml b/.travis.yml
index 07ed19b..e485e43 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -63,6 +63,10 @@ before_script:
 
 # 'make distcheck', and OS X package build on tag builds.
 script:
+  - |
+    if test osx = "${TRAVIS_OS_NAME}"; then
+      sysctl hw.ncpu
+    fi
   - ./autogen.sh
   - ./configure --enable-compile-warnings=error --enable-examples
   - make distcheck VERBOSE=1 V=1