diff --git a/src/UglyToad.PdfPig.Fonts/TrueType/Tables/GlyphDataTable.cs b/src/UglyToad.PdfPig.Fonts/TrueType/Tables/GlyphDataTable.cs
index 7681497c..4bfad7a1 100644
--- a/src/UglyToad.PdfPig.Fonts/TrueType/Tables/GlyphDataTable.cs
+++ b/src/UglyToad.PdfPig.Fonts/TrueType/Tables/GlyphDataTable.cs
@@ -240,9 +240,15 @@
                 flags = (CompositeGlyphFlags)data.ReadUnsignedShort();
                 var glyphIndex = data.ReadUnsignedShort();
 
-                var childGlyph = glyphs[glyphIndex];
+                if (glyphIndex >= glyphs.Length)
+                {
+                    // Unsure why this happens but fixes #1213
+                    continue; // TODO - Is there a better fix?
+                }
 
-                if (childGlyph == null)
+                IGlyphDescription? childGlyph = glyphs[glyphIndex];
+
+                if (childGlyph is null)
                 {
                     if (!compositeLocations.TryGetValue(glyphIndex, out var missingComposite))
                     {
@@ -319,7 +325,7 @@
                 }
             }
 
-            builderGlyph = builderGlyph ?? emptyGlyph;
+            builderGlyph ??= emptyGlyph;
 
             return new Glyph(false, builderGlyph.Instructions, builderGlyph.EndPointsOfContours, builderGlyph.Points, compositeLocation.Bounds);
         }
@@ -426,7 +432,7 @@
             }
         }
 
-        private class CompositeComponent
+        private sealed class CompositeComponent
         {
             public int Index { get; }
 
diff --git a/src/UglyToad.PdfPig.Tests/Integration/Documents/GlyphDataTableReadCompositeGlyphError.pdf b/src/UglyToad.PdfPig.Tests/Integration/Documents/GlyphDataTableReadCompositeGlyphError.pdf
new file mode 100644
index 00000000..e14e9079
Binary files /dev/null and b/src/UglyToad.PdfPig.Tests/Integration/Documents/GlyphDataTableReadCompositeGlyphError.pdf differ
diff --git a/src/UglyToad.PdfPig.Tests/Integration/GithubIssuesTests.cs b/src/UglyToad.PdfPig.Tests/Integration/GithubIssuesTests.cs
index 4a73f8f9..e122ca40 100644
--- a/src/UglyToad.PdfPig.Tests/Integration/GithubIssuesTests.cs
+++ b/src/UglyToad.PdfPig.Tests/Integration/GithubIssuesTests.cs
@@ -11,6 +11,21 @@
 
     public class GithubIssuesTests
     {
+        [Fact]
+        public void Issue1213()
+        {
+            var path = IntegrationHelpers.GetDocumentPath("GlyphDataTableReadCompositeGlyphError.pdf");
+
+            using (var document = PdfDocument.Open(path, new ParsingOptions() { UseLenientParsing = true }))
+            {
+                for (int p = 1; p <= document.NumberOfPages; p++)
+                {
+                    var page = document.GetPage(p);
+                    Assert.NotNull(page);
+                }
+            }
+        }
+
         [Fact]
         public void Issue1208()
         {