diff --git a/include/types/sample.h b/include/types/sample.h
index 3dfaec960..956e7946b 100644
--- a/include/types/sample.h
+++ b/include/types/sample.h
@@ -293,4 +293,7 @@ struct sample_conv_kw_list {
 	struct sample_conv kw[VAR_ARRAY];         /* array of sample conversion descriptors */
 };
 
+typedef int (*sample_cast_fct)(struct sample *smp);
+extern sample_cast_fct sample_casts[SMP_TYPES][SMP_TYPES];
+
 #endif /* _TYPES_SAMPLE_H */
diff --git a/src/sample.c b/src/sample.c
index dc2304a7d..72412c941 100644
--- a/src/sample.c
+++ b/src/sample.c
@@ -512,8 +512,7 @@ static int c_str2int(struct sample *smp)
 /*           NULL pointer used for impossible sample casts       */
 /*****************************************************************/
 
-typedef int (*sample_cast_fct)(struct sample *smp);
-static sample_cast_fct sample_casts[SMP_TYPES][SMP_TYPES] = {
+sample_cast_fct sample_casts[SMP_TYPES][SMP_TYPES] = {
 /*            to:  BOOL       UINT       SINT       IPV4      IPV6        STR         BIN        CSTR        CBIN   */
 /* from: BOOL */ { c_none,    c_none,    c_none,    NULL,     NULL,       c_int2str,  NULL,      c_int2str,  NULL   },
 /*       UINT */ { c_none,    c_none,    c_none,    c_int2ip, NULL,       c_int2str,  NULL,      c_int2str,  NULL   },