diff --git a/src/main/java/net/fortuna/ical4j/model/TemporalAmountAdapter.java b/src/main/java/net/fortuna/ical4j/model/TemporalAmountAdapter.java
index d584d3b5e..17fb0dc17 100644
--- a/src/main/java/net/fortuna/ical4j/model/TemporalAmountAdapter.java
+++ b/src/main/java/net/fortuna/ical4j/model/TemporalAmountAdapter.java
@@ -1,5 +1,6 @@
 package net.fortuna.ical4j.model;
 
+import net.fortuna.ical4j.util.CompatibilityHints;
 import org.apache.commons.lang3.builder.EqualsBuilder;
 import org.apache.commons.lang3.builder.HashCodeBuilder;
 
@@ -115,7 +116,10 @@ private String durationToString(Duration duration) {
 
     public static TemporalAmountAdapter parse(String value) {
         TemporalAmount retVal = null;
-        if (value.matches("([+-])?P.*(W|D)")) {
+        if ("P".equals(value) && CompatibilityHints.isHintEnabled(CompatibilityHints.KEY_RELAXED_PARSING)) {
+            retVal = Period.ZERO;
+        }
+        else if (value.matches("([+-])?P.*(W|D)")) {
             retVal = java.time.Period.parse(value);
         } else {
             retVal = java.time.Duration.parse(value);
diff --git a/src/test/groovy/net/fortuna/ical4j/model/TemporalAmountAdapterTest.groovy b/src/test/groovy/net/fortuna/ical4j/model/TemporalAmountAdapterTest.groovy
index 1d48670a9..7aaa65813 100644
--- a/src/test/groovy/net/fortuna/ical4j/model/TemporalAmountAdapterTest.groovy
+++ b/src/test/groovy/net/fortuna/ical4j/model/TemporalAmountAdapterTest.groovy
@@ -1,5 +1,6 @@
 package net.fortuna.ical4j.model
 
+import net.fortuna.ical4j.util.CompatibilityHints
 import spock.lang.Specification
 import spock.lang.Unroll
 
@@ -26,6 +27,18 @@ class TemporalAmountAdapterTest extends Specification {
         Duration.ofDays(15).plusHours(5).plusSeconds(20)    | 'P15DT5H0M20S'
     }
 
+    def "verify relaxed string parsing"() {
+        setup: 'enable relaxed parsing'
+        CompatibilityHints.setHintEnabled(CompatibilityHints.KEY_RELAXED_PARSING, true)
+
+        expect:
+        TemporalAmountAdapter.parse(stringValue).duration == expectedDuration
+
+        where:
+        stringValue     | expectedDuration
+        "P"             | java.time.Period.ZERO
+    }
+
     def 'verify temporalamount creation'() {
         expect:
         TemporalAmountAdapter.from(duration).duration == expectedTemporalAmount