diff --git a/src/main/java/com/shapesecurity/salvation/Parser.java b/src/main/java/com/shapesecurity/salvation/Parser.java
index b382a119..cce27e3a 100644
--- a/src/main/java/com/shapesecurity/salvation/Parser.java
+++ b/src/main/java/com/shapesecurity/salvation/Parser.java
@@ -52,7 +52,7 @@ public class Parser {
     private static final String unsafeInlineWarningMessage = "The \"'unsafe-inline'\" keyword-source has no effect in source lists that contain hash-source or nonce-source in CSP2 and later. " + explanation;
     private static final String strictDynamicWarningMessage = "The host-source and scheme-source expressions, as well as the \"'unsafe-inline'\" and \"'self'\" keyword-sources have no effect in source lists that contain \"'strict-dynamic'\" in CSP3 and later. " + explanation;
     private static final String unsafeHashedWithoutHashWarningMessage = "The \"'unsafe-hashed-attributes'\" keyword-source has no effect in source lists that do not contain hash-source in CSP3 and later.";
-    private enum SeenStates {SEEN_HASH, SEEN_HOST_OR_SCHEME_SOURCE, SEEN_NONE, SEEN_NONCE, SEEN_SELF, SEEN_STRICT_DYNAMIC, SEEN_UNSAFE_EVAL, SEEN_UNSAFE_INLINE, SEEN_UNSAFE_HASHED_ATTR};
+    private enum SeenStates {SEEN_HASH, SEEN_HOST_OR_SCHEME_SOURCE, SEEN_NONE, SEEN_NONCE, SEEN_SELF, SEEN_STRICT_DYNAMIC, SEEN_UNSAFE_EVAL, SEEN_UNSAFE_INLINE, SEEN_UNSAFE_HASHED_ATTR, SEEN_REPORT_SAMPLE};
     @Nonnull protected final Token[] tokens;
     @Nonnull private final Origin origin;
     protected int index = 0;
@@ -391,6 +391,8 @@ private void enforceMissingDirectiveValue(@Nonnull Token directiveNameToken) thr
                     seenStates.add(SeenStates.SEEN_HOST_OR_SCHEME_SOURCE);
                 } else if (se == KeywordSource.UnsafeHashedAttributes) {
                     seenStates.add(SeenStates.SEEN_UNSAFE_HASHED_ATTR);
+                } else if (se == KeywordSource.ReportSample) {
+                    seenStates.add(SeenStates.SEEN_REPORT_SAMPLE);
                 }
                 sourceExpressions.add(se);
             } catch (DirectiveValueParseException e) {
@@ -441,6 +443,8 @@ private void enforceMissingDirectiveValue(@Nonnull Token directiveNameToken) thr
                 return KeywordSource.UnsafeRedirect;
             case "'unsafe-hashed-attributes'":
                 return KeywordSource.UnsafeHashedAttributes;
+            case "'report-sample'":
+                return KeywordSource.ReportSample;
             default:
                 checkForUnquotedKeyword(token);
                 if (token.value.startsWith("'nonce-")) {
diff --git a/src/main/java/com/shapesecurity/salvation/directiveValues/KeywordSource.java b/src/main/java/com/shapesecurity/salvation/directiveValues/KeywordSource.java
index a33b0cf4..42b5d5b3 100644
--- a/src/main/java/com/shapesecurity/salvation/directiveValues/KeywordSource.java
+++ b/src/main/java/com/shapesecurity/salvation/directiveValues/KeywordSource.java
@@ -1,13 +1,13 @@
 package com.shapesecurity.salvation.directiveValues;
 
 
+import javax.annotation.Nonnull;
+
 import com.shapesecurity.salvation.data.GUID;
 import com.shapesecurity.salvation.data.Origin;
 import com.shapesecurity.salvation.data.URI;
 import com.shapesecurity.salvation.interfaces.MatchesSource;
 
-import javax.annotation.Nonnull;
-
 public class KeywordSource implements SourceExpression, AncestorSource, MatchesSource {
     @Nonnull public static final KeywordSource Self = new KeywordSource("self");
     @Nonnull public static final KeywordSource UnsafeInline = new KeywordSource("unsafe-inline");
@@ -15,6 +15,7 @@ public class KeywordSource implements SourceExpression, AncestorSource, MatchesS
     @Nonnull public static final KeywordSource UnsafeRedirect = new KeywordSource("unsafe-redirect");
     @Nonnull public static final KeywordSource StrictDynamic = new KeywordSource("strict-dynamic");
     @Nonnull public static final KeywordSource UnsafeHashedAttributes = new KeywordSource("unsafe-hashed-attributes");
+    @Nonnull public static final KeywordSource ReportSample = new KeywordSource("report-sample");
     @Nonnull private final String value;
 
     private KeywordSource(@Nonnull String value) {
diff --git a/src/test/java/com/shapesecurity/salvation/ParserTest.java b/src/test/java/com/shapesecurity/salvation/ParserTest.java
index 25ea6009..7f469b1f 100644
--- a/src/test/java/com/shapesecurity/salvation/ParserTest.java
+++ b/src/test/java/com/shapesecurity/salvation/ParserTest.java
@@ -1050,4 +1050,34 @@ public class ParserTest extends CSPTest {
         assertEquals(1, p.getDirectives().size());
         assertEquals(0, notices.size());
     }
+
+    @Test public void testReportSample() {
+        Policy p;
+        ArrayList<Notice> notices = new ArrayList<>();
+        p = parseWithNotices("default-src 'report-sample'", notices);
+        assertEquals(1, p.getDirectives().size());
+        assertEquals(0, notices.size());
+
+        notices.clear();
+        p = parseWithNotices("script-src 'report-sample' 'report-sample'", notices);
+        assertEquals(1, p.getDirectives().size());
+        assertEquals("script-src 'report-sample'", p.getDirectiveByType(ScriptSrcDirective.class).show());
+        assertEquals(0, notices.size());
+
+        notices.clear();
+        p = parseWithNotices("style-src 'report-sample' 'unsafe-hashed-attributes' 'report-sample' 'nonce-123'", notices);
+        assertEquals(1, p.getDirectives().size());
+        assertEquals(2, notices.size());
+        assertEquals("Invalid base64-value (should be multiple of 4 bytes: 3).", notices.get(0).message);
+
+        notices.clear();
+        p = parseWithNotices("default-src 'strict-dynamic' 'report-sample'", notices);
+        assertEquals(1, p.getDirectives().size());
+        assertEquals(0, notices.size());
+
+        notices.clear();
+        p = parseWithNotices("img-src 'report-sample'", notices);
+        assertEquals(1, p.getDirectives().size());
+        assertEquals(0, notices.size());
+    }
 }