diff --git a/docs/pages/release_notes.md b/docs/pages/release_notes.md
index 51de4955c2..1ccb0875a8 100644
--- a/docs/pages/release_notes.md
+++ b/docs/pages/release_notes.md
@@ -39,6 +39,7 @@ This is a {{ site.pmd.release_type }} release.
     *   [#1632](https://github.com/pmd/pmd/issues/1632): \[java] ConsecutiveLiteralAppends false positive over catch
 *   plsql
     *   [#1587](https://github.com/pmd/pmd/issues/1587): \[plsql] Parse Exception with EXISTS
+    *   [#1589](https://github.com/pmd/pmd/issues/1589): \[plsql] ParseException with subqueries in WHERE clause
 
 ### API Changes
 
diff --git a/pmd-plsql/etc/grammar/PldocAST.jjt b/pmd-plsql/etc/grammar/PldocAST.jjt
index 9d7327454c..87fd861cfa 100644
--- a/pmd-plsql/etc/grammar/PldocAST.jjt
+++ b/pmd-plsql/etc/grammar/PldocAST.jjt
@@ -1481,6 +1481,8 @@ ASTSqlExpression SqlExpression() :
     LOOKAHEAD(2) Column()
  |
     LOOKAHEAD(2) <ROWNUM>
+ |
+    LOOKAHEAD(2) "(" SelectStatement() ")"  // see "Scalar Subquery Expressions"
  |
     AdditiveExpression() // this can be a literal or a simple expression, but no conditional
  )
diff --git a/pmd-plsql/src/test/java/net/sourceforge/pmd/lang/plsql/ast/TableCollectionExpression.java b/pmd-plsql/src/test/java/net/sourceforge/pmd/lang/plsql/ast/TableCollectionExpressionTest.java
similarity index 92%
rename from pmd-plsql/src/test/java/net/sourceforge/pmd/lang/plsql/ast/TableCollectionExpression.java
rename to pmd-plsql/src/test/java/net/sourceforge/pmd/lang/plsql/ast/TableCollectionExpressionTest.java
index e5ddb26302..1daad5882a 100644
--- a/pmd-plsql/src/test/java/net/sourceforge/pmd/lang/plsql/ast/TableCollectionExpression.java
+++ b/pmd-plsql/src/test/java/net/sourceforge/pmd/lang/plsql/ast/TableCollectionExpressionTest.java
@@ -12,7 +12,7 @@ import org.junit.Test;
 
 import net.sourceforge.pmd.lang.plsql.AbstractPLSQLParserTst;
 
-public class TableCollectionExpression extends AbstractPLSQLParserTst {
+public class TableCollectionExpressionTest extends AbstractPLSQLParserTst {
 
     @Test
     public void testExamples() throws Exception {
diff --git a/pmd-plsql/src/test/java/net/sourceforge/pmd/lang/plsql/ast/WhereClauseTest.java b/pmd-plsql/src/test/java/net/sourceforge/pmd/lang/plsql/ast/WhereClauseTest.java
index 98ef0c72ff..38ef2de44a 100644
--- a/pmd-plsql/src/test/java/net/sourceforge/pmd/lang/plsql/ast/WhereClauseTest.java
+++ b/pmd-plsql/src/test/java/net/sourceforge/pmd/lang/plsql/ast/WhereClauseTest.java
@@ -94,4 +94,11 @@ public class WhereClauseTest extends AbstractPLSQLParserTst {
         Assert.assertEquals("'([aeiou])\\1'", regexps.get(1).getPattern().getImage());
         Assert.assertEquals("'i'", regexps.get(1).getMatchParam());
     }
+
+    @Test
+    public void testSubqueries() throws Exception {
+        String code = IOUtils.toString(this.getClass().getResourceAsStream("WhereClauseSubqueries.pls"),
+                StandardCharsets.UTF_8);
+        ASTInput input = parsePLSQL(code);
+    }
 }
diff --git a/pmd-plsql/src/test/resources/net/sourceforge/pmd/lang/plsql/ast/WhereClauseSubqueries.pls b/pmd-plsql/src/test/resources/net/sourceforge/pmd/lang/plsql/ast/WhereClauseSubqueries.pls
new file mode 100644
index 0000000000..a6c25d36d5
--- /dev/null
+++ b/pmd-plsql/src/test/resources/net/sourceforge/pmd/lang/plsql/ast/WhereClauseSubqueries.pls
@@ -0,0 +1,14 @@
+--
+-- Where Clause with Subqueries
+--
+
+BEGIN
+
+SELECT id INTO v_id FROM my_table
+  WHERE id = (SELECT id FROM other_table);
+
+UPDATE my_table SET name = 'a'
+  WHERE id = (SELECT id FROM other_table);
+
+END;
+/