diff --git a/Source/kwsys/hashtable.hxx.in b/Source/kwsys/hashtable.hxx.in
index db52fc846..c83550304 100644
--- a/Source/kwsys/hashtable.hxx.in
+++ b/Source/kwsys/hashtable.hxx.in
@@ -394,7 +394,7 @@ enum { _stl_num_primes = 31 };
 
 // create a function with a static local to that function that returns
 // the static
-inline const unsigned long* get_stl_prime_list() {
+static inline const unsigned long* get_stl_prime_list() {
 
 static const unsigned long _stl_prime_list[_stl_num_primes] =
 {