diff --git a/common.gypi b/common.gypi
index 8886b743927d..7c0e9f46dd71 100644
--- a/common.gypi
+++ b/common.gypi
@@ -190,6 +190,7 @@
             'ldflags': [ '-m64' ],
           }],
           [ 'OS=="solaris"', {
+            'defines': ['_GLIBCXX_USE_C99_MATH'],
             'cflags': [ '-pthreads' ],
             'ldflags': [ '-pthreads' ],
             'cflags!': [ '-pthread' ],