diff --git a/packages/mysql-on-sqlite/src/sqlite/class-wp-mysql-on-sqlite.php b/packages/mysql-on-sqlite/src/sqlite/class-wp-mysql-on-sqlite.php
index 2205634f6..36f045da9 100644
--- a/packages/mysql-on-sqlite/src/sqlite/class-wp-mysql-on-sqlite.php
+++ b/packages/mysql-on-sqlite/src/sqlite/class-wp-mysql-on-sqlite.php
@@ -6071,7 +6071,7 @@ function ( $column ) use ( $is_strict_mode, $insert_map ) {
 						return false;
 					}
 					$is_nullable  = 'YES' === $column['IS_NULLABLE'];
-					$has_default  = $column['COLUMN_DEFAULT'];
+					$has_default  = null !== $column['COLUMN_DEFAULT'];
 					$is_generated = str_contains( $column['EXTRA'], 'auto_increment' );
 					return ! ( $is_nullable || $has_default || $is_generated );
 				}
diff --git a/packages/mysql-on-sqlite/tests/WP_MySQL_On_SQLite_Tests.php b/packages/mysql-on-sqlite/tests/WP_MySQL_On_SQLite_Tests.php
index fa0ff7b1c..5d36d7a5c 100644
--- a/packages/mysql-on-sqlite/tests/WP_MySQL_On_SQLite_Tests.php
+++ b/packages/mysql-on-sqlite/tests/WP_MySQL_On_SQLite_Tests.php
@@ -8626,6 +8626,14 @@ public function testNonStrictSqlModeNotNullWithDefault(): void {
 		$result = $this->assertQuery( 'SELECT * FROM t3' );
 		$this->assertCount( 1, $result );
 		$this->assertSame( '', $result[0]->value );
+
+		// No value saves DEFAULT '0' (issue #552):
+		$this->assertQuery( "CREATE TABLE t4 (id INT NOT NULL, label VARCHAR(10) NOT NULL DEFAULT '0', count INT NOT NULL DEFAULT 0)" );
+		$this->assertQuery( 'INSERT INTO t4 (id) VALUES (1)' );
+		$result = $this->assertQuery( 'SELECT * FROM t4 WHERE id = 1' );
+		$this->assertCount( 1, $result );
+		$this->assertSame( '0', $result[0]->label );
+		$this->assertSame( '0', $result[0]->count );
 	}
 
 	public function testNonStrictModeWithDefaultCurrentTimestamp(): void {