diff --git a/include/spdk/json.h b/include/spdk/json.h
index 915939d70..ed5fb660e 100644
--- a/include/spdk/json.h
+++ b/include/spdk/json.h
@@ -176,7 +176,6 @@ bool spdk_json_strequal(const struct spdk_json_val *val, const char *str);
  */
 char *spdk_json_strdup(const struct spdk_json_val *val);
 
-int spdk_json_number_to_double(const struct spdk_json_val *val, double *num);
 int spdk_json_number_to_int32(const struct spdk_json_val *val, int32_t *num);
 int spdk_json_number_to_uint32(const struct spdk_json_val *val, uint32_t *num);
 
diff --git a/lib/json/json_util.c b/lib/json/json_util.c
index 18bf48d1b..edf9a83f5 100644
--- a/lib/json/json_util.c
+++ b/lib/json/json_util.c
@@ -199,30 +199,6 @@ spdk_json_number_split(const struct spdk_json_val *val, struct spdk_json_num *nu
 	return 0;
 }
 
-int
-spdk_json_number_to_double(const struct spdk_json_val *val, double *num)
-{
-	char buf[32];
-	char *end;
-
-	if (val->type != SPDK_JSON_VAL_NUMBER || val->len >= sizeof(buf)) {
-		*num = 0.0;
-		return -1;
-	}
-
-	memcpy(buf, val->start, val->len);
-	buf[val->len] = '\0';
-
-	errno = 0;
-	/* TODO: strtod() uses locale for decimal point (. is not guaranteed) */
-	*num = strtod(buf, &end);
-	if (*end != '\0' || errno != 0) {
-		return -1;
-	}
-
-	return 0;
-}
-
 int
 spdk_json_number_to_int32(const struct spdk_json_val *val, int32_t *num)
 {