src/google/sparsetable |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/src/google/sparsetable b/src/google/sparsetable
index 0eeb22e..e8580b9 100644
--- a/src/google/sparsetable
+++ b/src/google/sparsetable
@@ -83,6 +83,8 @@
 #endif
 #endif
 
+#include <cstddef>
+
 _START_GOOGLE_NAMESPACE_
 
 #ifndef HAVE_U_INT16_T