diff --git a/pmd-apex/src/main/java/net/sourceforge/pmd/lang/apex/ast/ASTLiteralExpression.java b/pmd-apex/src/main/java/net/sourceforge/pmd/lang/apex/ast/ASTLiteralExpression.java
index b3011ff47a..047d4b413c 100644
--- a/pmd-apex/src/main/java/net/sourceforge/pmd/lang/apex/ast/ASTLiteralExpression.java
+++ b/pmd-apex/src/main/java/net/sourceforge/pmd/lang/apex/ast/ASTLiteralExpression.java
@@ -4,6 +4,8 @@
 
 package net.sourceforge.pmd.lang.apex.ast;
 
+import net.sourceforge.pmd.lang.document.Chars;
+
 import com.google.summit.ast.expression.LiteralExpression;
 import com.google.summit.ast.expression.VariableExpression;
 
@@ -38,7 +40,12 @@ public final class ASTLiteralExpression extends AbstractApexNode.Single<LiteralE
         } else if (node instanceof LiteralExpression.IntegerVal) {
             return LiteralType.INTEGER;
         } else if (node instanceof LiteralExpression.DoubleVal) {
-            return LiteralType.DOUBLE;
+            Chars source = getTextDocument().getText().slice(getTextRegion());
+            if (source.indexOf('d') > -1 || source.indexOf('D') > -1) {
+                return LiteralType.DOUBLE;
+            } else {
+                return LiteralType.DECIMAL;
+            }
         } else if (node instanceof LiteralExpression.LongVal) {
             return LiteralType.LONG;
         /* TODO(b/239648780): the parser must distinguish decimal vs. double
@@ -88,8 +95,8 @@ public final class ASTLiteralExpression extends AbstractApexNode.Single<LiteralE
     /**
      * Returns the name of this literal when it is labeled in an object initializer with named
      * arguments ({@link ASTNewKeyValueObjectExpression}).
-     * <p>
-     * For example, in the Apex code
+     *
+     * <p>For example, in the Apex code
      * <pre>{@code
      * new X(a = 1, b = 2)
      * }</pre>
diff --git a/pmd-apex/src/test/java/net/sourceforge/pmd/lang/apex/ast/ASTLiteralExpressionTest.java b/pmd-apex/src/test/java/net/sourceforge/pmd/lang/apex/ast/ASTLiteralExpressionTest.java
new file mode 100644
index 0000000000..c249c8df5a
--- /dev/null
+++ b/pmd-apex/src/test/java/net/sourceforge/pmd/lang/apex/ast/ASTLiteralExpressionTest.java
@@ -0,0 +1,47 @@
+/*
+ * BSD-style license; for more info see http://pmd.sourceforge.net/license.html
+ */
+
+package net.sourceforge.pmd.lang.apex.ast;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.Test;
+
+class ASTLiteralExpressionTest extends ApexParserTestBase {
+
+    @Test
+    void doubleLiteral() {
+        ASTLiteralExpression literal = createLiteral("1.2d");
+        assertTrue(literal.isDouble());
+        assertEquals(ASTLiteralExpression.LiteralType.DOUBLE, literal.getLiteralType());
+        assertEquals("1.2", literal.getImage());
+
+        literal = createLiteral("1.2D");
+        assertTrue(literal.isDouble());
+        assertEquals(ASTLiteralExpression.LiteralType.DOUBLE, literal.getLiteralType());
+    }
+
+    @Test
+    void decimalLiteral() {
+        ASTLiteralExpression literal = createLiteral("1.2");
+        assertTrue(literal.isDecimal());
+        assertEquals(ASTLiteralExpression.LiteralType.DECIMAL, literal.getLiteralType());
+        assertEquals("1.2", literal.getImage());
+    }
+
+    @Test
+    void stringLiteral() {
+        ASTLiteralExpression literal = createLiteral("'foo'");
+        assertTrue(literal.isString());
+        assertEquals(ASTLiteralExpression.LiteralType.STRING, literal.getLiteralType());
+        assertEquals("foo", literal.getImage());
+    }
+
+    private ASTLiteralExpression createLiteral(String code) {
+        return parse("class Foo { object field = " + code + "; }")
+                .descendants(ASTLiteralExpression.class)
+                .first();
+    }
+}