diff --git a/zpa-checks/src/integrationTest/resources/expected/antlr-grammars-v4/ParsingErrorCheck.json b/zpa-checks/src/integrationTest/resources/expected/antlr-grammars-v4/ParsingErrorCheck.json
index f81fb24a..c8781d9b 100644
--- a/zpa-checks/src/integrationTest/resources/expected/antlr-grammars-v4/ParsingErrorCheck.json
+++ b/zpa-checks/src/integrationTest/resources/expected/antlr-grammars-v4/ParsingErrorCheck.json
@@ -413,9 +413,6 @@
   "examples/single_statement.sql" : [
     1
   ],
-  "examples/to_dsinterval.sql" : [
-    3
-  ],
   "examples/to_number.sql" : [
     6
   ],
@@ -425,9 +422,6 @@
   "examples/to_timestamp_tz.sql" : [
     6
   ],
-  "examples/to_yminterval.sql" : [
-    3
-  ],
   "examples/truncate_cluster.sql" : [
     1
   ],
diff --git a/zpa-checks/src/integrationTest/resources/expected/oracle-database_23/ParsingErrorCheck.json b/zpa-checks/src/integrationTest/resources/expected/oracle-database_23/ParsingErrorCheck.json
index 41d98919..13630a5d 100644
--- a/zpa-checks/src/integrationTest/resources/expected/oracle-database_23/ParsingErrorCheck.json
+++ b/zpa-checks/src/integrationTest/resources/expected/oracle-database_23/ParsingErrorCheck.json
@@ -2858,9 +2858,6 @@
   "sqlrf/Syntax-for-Schema-Objects-and-Parts-in-SQL-Statements-4.sql" : [
     3
   ],
-  "sqlrf/TO_DSINTERVAL-2.sql" : [
-    3
-  ],
   "sqlrf/TO_NUMBER-2.sql" : [
     2
   ],
diff --git a/zpa-core/src/main/kotlin/org/sonar/plugins/plsqlopen/api/PlSqlKeyword.kt b/zpa-core/src/main/kotlin/org/sonar/plugins/plsqlopen/api/PlSqlKeyword.kt
index 0812a03c..7b59f8d0 100644
--- a/zpa-core/src/main/kotlin/org/sonar/plugins/plsqlopen/api/PlSqlKeyword.kt
+++ b/zpa-core/src/main/kotlin/org/sonar/plugins/plsqlopen/api/PlSqlKeyword.kt
@@ -519,6 +519,7 @@ enum class PlSqlKeyword(override val value: String, val isReserved: Boolean = fa
     TO_BINARY_FLOAT("to_binary_float"),
     TO_BOOLEAN("to_boolean"),
     TO_DATE("to_date"),
+    TO_DSINTERVAL("to_dsinterval"),
     TRAILING("trailing"),
     TRANSACTION("transaction"),
     TREAT("treat"),
diff --git a/zpa-core/src/main/kotlin/org/sonar/plugins/plsqlopen/api/SingleRowSqlFunctionsGrammar.kt b/zpa-core/src/main/kotlin/org/sonar/plugins/plsqlopen/api/SingleRowSqlFunctionsGrammar.kt
index c4124293..55a9f081 100644
--- a/zpa-core/src/main/kotlin/org/sonar/plugins/plsqlopen/api/SingleRowSqlFunctionsGrammar.kt
+++ b/zpa-core/src/main/kotlin/org/sonar/plugins/plsqlopen/api/SingleRowSqlFunctionsGrammar.kt
@@ -132,6 +132,7 @@ enum class SingleRowSqlFunctionsGrammar : GrammarRuleKey {
     TO_BINARY_FLOAT_EXPRESSION,
     TO_BOOLEAN_EXPRESSION,
     TO_DATE_EXPRESSION,
+    TO_DSINTERVAL_EXPRESSION,
     TRIM_EXPRESSION,
     TABLE_EXPRESSION,
     THE_EXPRESSION,
@@ -187,6 +188,7 @@ enum class SingleRowSqlFunctionsGrammar : GrammarRuleKey {
                     TO_BINARY_FLOAT_EXPRESSION,
                     TO_BOOLEAN_EXPRESSION,
                     TO_DATE_EXPRESSION,
+                    TO_DSINTERVAL_EXPRESSION,
                     TRIM_EXPRESSION,
                     TABLE_EXPRESSION,
                     THE_EXPRESSION,
@@ -257,6 +259,13 @@ enum class SingleRowSqlFunctionsGrammar : GrammarRuleKey {
                 RPARENTHESIS
             )
 
+            b.rule(TO_DSINTERVAL_EXPRESSION).define(
+                TO_DSINTERVAL, LPARENTHESIS,
+                EXPRESSION,
+                b.optional(DEFAULT_ON_ERROR_CLAUSE),
+                RPARENTHESIS
+            )
+
             b.rule(TABLE_EXPRESSION).define(
                 TABLE, LPARENTHESIS,
                 b.firstOf(DmlGrammar.SELECT_EXPRESSION, EXPRESSION),
diff --git a/zpa-core/src/test/kotlin/org/sonar/plugins/plsqlopen/api/expressions/ToDsintervalExpressionTest.kt b/zpa-core/src/test/kotlin/org/sonar/plugins/plsqlopen/api/expressions/ToDsintervalExpressionTest.kt
new file mode 100644
index 00000000..24450530
--- /dev/null
+++ b/zpa-core/src/test/kotlin/org/sonar/plugins/plsqlopen/api/expressions/ToDsintervalExpressionTest.kt
@@ -0,0 +1,45 @@
+/**
+ * Z PL/SQL Analyzer
+ * Copyright (C) 2015-2024 Felipe Zorzo
+ * mailto:felipe AT felipezorzo DOT com DOT br
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonar.plugins.plsqlopen.api.expressions
+
+import com.felipebz.flr.tests.Assertions.assertThat
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import org.sonar.plugins.plsqlopen.api.PlSqlGrammar
+import org.sonar.plugins.plsqlopen.api.RuleTest
+
+class ToDsintervalExpressionTest : RuleTest() {
+
+    @BeforeEach
+    fun init() {
+        setRootRule(PlSqlGrammar.EXPRESSION)
+    }
+
+    @Test
+    fun matchesSimple() {
+        assertThat(p).matches("to_dsinterval(foo)")
+    }
+
+    @Test
+    fun matchesDefaultClause() {
+        assertThat(p).matches("to_dsinterval(foo default false on conversion error)")
+    }
+
+}