diff --git a/src/libraries/System.Private.CoreLib/src/System/Globalization/JapaneseCalendar.Nls.cs b/src/libraries/System.Private.CoreLib/src/System/Globalization/JapaneseCalendar.Nls.cs
index a65f5c5cb1452..1ae65aa57432d 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Globalization/JapaneseCalendar.Nls.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Globalization/JapaneseCalendar.Nls.cs
@@ -196,7 +196,7 @@ private static int CompareEraRanges(EraInfo a, EraInfo b)
                 ReadOnlySpan<char> eraName = dataSpan[names[0]];
                 ReadOnlySpan<char> abbreviatedEraName = dataSpan[names[1]];
                 ReadOnlySpan<char> englishEraName = dataSpan[names[2]];
-                ReadOnlySpan<char> abbreviatedEnglishEraName = dataSpan[names[2]];
+                ReadOnlySpan<char> abbreviatedEnglishEraName = dataSpan[names[3]];
 
                 // Each part should have data in it
                 if (!eraName.IsEmpty && !abbreviatedEraName.IsEmpty && !englishEraName.IsEmpty && !abbreviatedEnglishEraName.IsEmpty)
diff --git a/src/libraries/System.Private.CoreLib/src/System/Reflection/AssemblyNameParser.cs b/src/libraries/System.Private.CoreLib/src/System/Reflection/AssemblyNameParser.cs
index 497ff718f8cf9..dae42bc06496d 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Reflection/AssemblyNameParser.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Reflection/AssemblyNameParser.cs
@@ -193,7 +193,7 @@ private Version ParseVersion(string attributeValue)
             ReadOnlySpan<char> attributeValueSpan = attributeValue;
             Span<Range> parts = stackalloc Range[5];
             parts = parts.Slice(0, attributeValueSpan.Split(parts, '.'));
-            if (parts.Length is not (3 or 4))
+            if (parts.Length is < 2 or > 4)
             {
                 ThrowInvalidAssemblyName();
             }