diff --git a/eo-parser/src/main/antlr4/org/eolang/parser/Eo.g4 b/eo-parser/src/main/antlr4/org/eolang/parser/Eo.g4
index 5d4199b4ac..e2414119e3 100644
--- a/eo-parser/src/main/antlr4/org/eolang/parser/Eo.g4
+++ b/eo-parser/src/main/antlr4/org/eolang/parser/Eo.g4
@@ -47,7 +47,7 @@ metas
 // Objects
 // Ends on the next line
 objects
-    : (object EOL?)* object
+    : (object EOL?)+
     ;
 
 comment
diff --git a/eo-parser/src/main/java/org/eolang/parser/XeEoListener.java b/eo-parser/src/main/java/org/eolang/parser/XeEoListener.java
index 8e9a7369da..c267cf62da 100644
--- a/eo-parser/src/main/java/org/eolang/parser/XeEoListener.java
+++ b/eo-parser/src/main/java/org/eolang/parser/XeEoListener.java
@@ -28,8 +28,10 @@
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Optional;
 import java.util.function.Supplier;
 import java.util.stream.Collectors;
+import javax.swing.text.html.Option;
 import org.antlr.v4.runtime.ParserRuleContext;
 import org.antlr.v4.runtime.Token;
 import org.antlr.v4.runtime.tree.ErrorNode;
@@ -280,11 +282,16 @@ public void exitJustNamed(final EoParser.JustNamedContext ctx) {
     }
 
     @Override
-    @SuppressWarnings("PMD.ConfusingTernary")
     public void enterAtom(final EoParser.AtomContext ctx) {
-        this.startObject(ctx)
-            .prop("atom", ctx.type().typeFqn().getText())
-            .leave();
+        final EoParser.TypeFqnContext fqn = ctx.type().typeFqn();
+        if (fqn == null) {
+            this.errors.add(XeEoListener.error(ctx, "Atom must have a type"));
+            this.startObject(ctx).leave();
+        } else {
+            this.startObject(ctx)
+                .prop("atom", fqn.getText())
+                .leave();
+        }
     }
 
     @Override
diff --git a/eo-parser/src/test/java/org/eolang/parser/EoSyntaxTest.java b/eo-parser/src/test/java/org/eolang/parser/EoSyntaxTest.java
index 7d082ca64e..5df6d00e83 100644
--- a/eo-parser/src/test/java/org/eolang/parser/EoSyntaxTest.java
+++ b/eo-parser/src/test/java/org/eolang/parser/EoSyntaxTest.java
@@ -89,7 +89,7 @@ void printsProperListingEvenWhenSyntaxIsBroken() throws Exception {
             "[] > x-н, 1\n"
         );
         MatcherAssert.assertThat(
-            EoIndentLexerTest.TO_ADD_MESSAGE,
+            "EO syntax is broken, but listing should be printed",
             XhtmlMatchers.xhtml(
                 new String(
                     new EoSyntax(
@@ -100,7 +100,7 @@ void printsProperListingEvenWhenSyntaxIsBroken() throws Exception {
                 )
             ),
             XhtmlMatchers.hasXPaths(
-                "/program/errors[count(error)=2]",
+                "/program/errors[count(error)=3]",
                 String.format("/program[listing='%s']", src)
             )
         );