diff --git a/java/ql/lib/semmle/code/java/Concepts.qll b/java/ql/lib/semmle/code/java/Concepts.qll
index eceb77d62ac..327c9a2c459 100644
--- a/java/ql/lib/semmle/code/java/Concepts.qll
+++ b/java/ql/lib/semmle/code/java/Concepts.qll
@@ -77,7 +77,7 @@ module RegexExecutionExpr {
     /** Gets the expression for the regex being executed by this node. */
     abstract Expr getRegex();
 
-    /** Gets a expression for the string to be searched or matched against. */
+    /** Gets an expression for the string to be searched or matched against. */
     abstract Expr getString();
 
     /**
diff --git a/java/ql/lib/semmle/code/java/frameworks/Regex.qll b/java/ql/lib/semmle/code/java/frameworks/Regex.qll
index 28b7dd6a31a..2578b4d24db 100644
--- a/java/ql/lib/semmle/code/java/frameworks/Regex.qll
+++ b/java/ql/lib/semmle/code/java/frameworks/Regex.qll
@@ -71,17 +71,17 @@ class PatternLiteralField extends Field {
   }
 }
 
-/** A call to the `compile` method of `java.util.regex.Pattern` */
+/** A call to the `compile` method of `java.util.regex.Pattern`. */
 class PatternCompileCall extends MethodCall {
   PatternCompileCall() { this.getMethod() instanceof PatternCompileMethod }
 }
 
-/** A call to the `matcher` method of `java.util.regex.Pattern` */
+/** A call to the `matcher` method of `java.util.regex.Pattern`. */
 class PatternMatcherCall extends MethodCall {
   PatternMatcherCall() { this.getMethod() instanceof PatternMatcherMethod }
 }
 
-/** A call to the `matches` method of `java.util.regex.Pattern` */
+/** A call to the `matches` method of `java.util.regex.Pattern`. */
 class PatternMatchesCall extends MethodCall, RegexExecutionExpr::Range {
   PatternMatchesCall() { this.getMethod() instanceof PatternMatchesMethod }
 
@@ -92,7 +92,7 @@ class PatternMatchesCall extends MethodCall, RegexExecutionExpr::Range {
   override string getName() { result = "Pattern.matches" }
 }
 
-/** A call to the `matches` method of `java.util.regex.Matcher` */
+/** A call to the `matches` method of `java.util.regex.Matcher`. */
 class MatcherMatchesCall extends MethodCall, RegexExecutionExpr::Range {
   MatcherMatchesCall() { this.getMethod() instanceof MatcherMatchesMethod }