diff --git a/changelog/fix_default_config_of_redundant_equality_comparison_block.md b/changelog/fix_default_config_of_redundant_equality_comparison_block.md
new file mode 100644
index 0000000000..24b73ea118
--- /dev/null
+++ b/changelog/fix_default_config_of_redundant_equality_comparison_block.md
@@ -0,0 +1 @@
+* [#352](https://github.com/rubocop/rubocop-performance/pull/352): Fix the default config for `AllowRegexpMatch` option of `Performance/RedundantEqualityComparisonBlock`. ([@koic][])
diff --git a/config/default.yml b/config/default.yml
index a345fb8dc6..6993c89521 100644
--- a/config/default.yml
+++ b/config/default.yml
@@ -226,7 +226,7 @@ Performance/RedundantEqualityComparisonBlock:
   Reference: 'https://github.com/rails/rails/pull/41363'
   Enabled: pending
   Safe: false
-  AllowRegexpMatch: false
+  AllowRegexpMatch: true
   VersionAdded: '1.10'
 
 Performance/RedundantMatch:
diff --git a/lib/rubocop/cop/performance/redundant_equality_comparison_block.rb b/lib/rubocop/cop/performance/redundant_equality_comparison_block.rb
index ff1771de6a..2600f5c969 100644
--- a/lib/rubocop/cop/performance/redundant_equality_comparison_block.rb
+++ b/lib/rubocop/cop/performance/redundant_equality_comparison_block.rb
@@ -10,7 +10,7 @@ module Performance
       # behavior is appropriately overridden in subclass. For example,
       # `Range#===` returns `true` when argument is within the range.
       #
-      # This cop has `AllowRegexpMatch` option and it is false by default because
+      # This cop has `AllowRegexpMatch` option and it is true by default because
       # `regexp.match?('string')` often used in block changes to the opposite result:
       #
       # [source,ruby]