diff --git a/.changelog/4489.txt b/.changelog/4489.txt
new file mode 100644
index 00000000000..4c53275d253
--- /dev/null
+++ b/.changelog/4489.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+sql: Fixed case diff for `charset` in `google_sql_database`
+```
diff --git a/google/resource_sql_database.go b/google/resource_sql_database.go
index 8c66ecb6091..13075d8e902 100644
--- a/google/resource_sql_database.go
+++ b/google/resource_sql_database.go
@@ -56,9 +56,10 @@ ID.`,
 This does not include the project ID or instance name.`,
 			},
 			"charset": {
-				Type:     schema.TypeString,
-				Computed: true,
-				Optional: true,
+				Type:             schema.TypeString,
+				Computed:         true,
+				Optional:         true,
+				DiffSuppressFunc: caseDiffSuppress,
 				Description: `The charset value. See MySQL's
 [Supported Character Sets and Collations](https://dev.mysql.com/doc/refman/5.7/en/charset-charsets.html)
 and Postgres' [Character Set Support](https://www.postgresql.org/docs/9.6/static/multibyte.html)