diff --git a/RegExpSupport/src/org/intellij/lang/regexp/RegExpLanguageHost.java b/RegExpSupport/src/org/intellij/lang/regexp/RegExpLanguageHost.java
index c0b38a07eee6..4bec8b86a659 100644
--- a/RegExpSupport/src/org/intellij/lang/regexp/RegExpLanguageHost.java
+++ b/RegExpSupport/src/org/intellij/lang/regexp/RegExpLanguageHost.java
@@ -106,6 +106,10 @@ public interface RegExpLanguageHost {
     return EMPTY_COMPLETION_ITEMS_ARRAY; 
   }
 
+  default boolean supportsPropertySyntax(@NotNull PsiElement context) {
+    return true;
+  }
+
   enum Lookbehind {
     /** Lookbehind not supported. */
     NOT_SUPPORTED,
diff --git a/RegExpSupport/src/org/intellij/lang/regexp/RegExpLanguageHosts.java b/RegExpSupport/src/org/intellij/lang/regexp/RegExpLanguageHosts.java
index 51c7d74eeb84..7780346c1856 100644
--- a/RegExpSupport/src/org/intellij/lang/regexp/RegExpLanguageHosts.java
+++ b/RegExpSupport/src/org/intellij/lang/regexp/RegExpLanguageHosts.java
@@ -94,6 +94,11 @@ public final class RegExpLanguageHosts extends ClassExtension<RegExpLanguageHost
     return host != null && host.supportsLiteralBackspace(regExpChar);
   }
 
+  public boolean supportsPropertySyntax(@NotNull PsiElement context) {
+    RegExpLanguageHost host = findRegExpHost(context);
+    return host != null && host.supportsPropertySyntax(context);
+  }
+
   public boolean supportsNamedGroupSyntax(@Nullable final RegExpGroup group) {
     final RegExpLanguageHost host = findRegExpHost(group);
     return host != null && host.supportsNamedGroupSyntax(group);
diff --git a/RegExpSupport/src/org/intellij/lang/regexp/ecmascript/EcmaScriptRegexpParserDefinition.java b/RegExpSupport/src/org/intellij/lang/regexp/ecmascript/EcmaScriptRegexpParserDefinition.java
index 254dbe863e28..b23510b7bbd7 100644
--- a/RegExpSupport/src/org/intellij/lang/regexp/ecmascript/EcmaScriptRegexpParserDefinition.java
+++ b/RegExpSupport/src/org/intellij/lang/regexp/ecmascript/EcmaScriptRegexpParserDefinition.java
@@ -24,6 +24,7 @@ public class EcmaScriptRegexpParserDefinition extends RegExpParserDefinition {
   private final EnumSet<RegExpCapability> CAPABILITIES = EnumSet.of(RegExpCapability.OCTAL_NO_LEADING_ZERO,
                                                                     RegExpCapability.DANGLING_METACHARACTERS,
                                                                     RegExpCapability.ALLOW_EMPTY_CHARACTER_CLASS,
+                                                                    RegExpCapability.PROPERTY_VALUES,
                                                                     RegExpCapability.MAX_OCTAL_377);
 
   @Override
diff --git a/RegExpSupport/src/org/intellij/lang/regexp/validation/RegExpAnnotator.java b/RegExpSupport/src/org/intellij/lang/regexp/validation/RegExpAnnotator.java
index a85c9588fb49..9f6f7c3a1dd3 100644
--- a/RegExpSupport/src/org/intellij/lang/regexp/validation/RegExpAnnotator.java
+++ b/RegExpSupport/src/org/intellij/lang/regexp/validation/RegExpAnnotator.java
@@ -219,6 +219,10 @@ public final class RegExpAnnotator extends RegExpElementVisitor implements Annot
     if (category == null) {
       return;
     }
+    if (!myLanguageHosts.supportsPropertySyntax(property)) {
+      myHolder.createErrorAnnotation(property, "Property escape sequences are not supported in this regex dialect"); 
+      return;
+    }
     String propertyName = category.getText();
     if(!myLanguageHosts.isValidCategory(category.getPsi(), propertyName)) {
       final Annotation a = myHolder.createErrorAnnotation(category, "Unknown character category");