diff --git a/ext/phashion_ext/extconf.rb b/ext/phashion_ext/extconf.rb
index 6758ba1..a7a2c0f 100644
--- a/ext/phashion_ext/extconf.rb
+++ b/ext/phashion_ext/extconf.rb
@@ -41,7 +41,7 @@
     system("cp -f libpHash.a libpHash_gem.a")
     system("cp -f libpHash.la libpHash_gem.la")
   end
-  $LIBS = " -lpthread -lpHash_gem -lstdc++ -ljpeg -lpng -lm"
+  $LIBS = " -lpthread -lpHash_gem -lstdc++ -ljpeg -lpng -lmvec -lm"
 end
 
 have_header 'sqlite3ext.h'