diff --git a/inferred-spans/src/main/java/io/opentelemetry/contrib/inferredspans/InferredSpans.java b/inferred-spans/src/main/java/io/opentelemetry/contrib/inferredspans/InferredSpans.java
index 76f55db83..0d8e14919 100644
--- a/inferred-spans/src/main/java/io/opentelemetry/contrib/inferredspans/InferredSpans.java
+++ b/inferred-spans/src/main/java/io/opentelemetry/contrib/inferredspans/InferredSpans.java
@@ -42,10 +42,12 @@ public static boolean isEnabled() {
    *
    * @param interval the new profiler interval
    */
-  public static void setProfilerInterval(Duration interval) {
+  @Nullable
+  public static Duration setProfilerInterval(Duration interval) {
     InferredSpansProcessor p = instance;
     if (p != null) {
-      p.setProfilerInterval(interval);
+      return p.setProfilerInterval(interval);
     }
+    return null;
   }
 }
diff --git a/inferred-spans/src/main/java/io/opentelemetry/contrib/inferredspans/InferredSpansProcessor.java b/inferred-spans/src/main/java/io/opentelemetry/contrib/inferredspans/InferredSpansProcessor.java
index 19baf3174..c5399002e 100644
--- a/inferred-spans/src/main/java/io/opentelemetry/contrib/inferredspans/InferredSpansProcessor.java
+++ b/inferred-spans/src/main/java/io/opentelemetry/contrib/inferredspans/InferredSpansProcessor.java
@@ -57,9 +57,10 @@ public class InferredSpansProcessor implements SpanProcessor {
     }
   }
 
-  public void setProfilerInterval(Duration interval) {
-    config.setProfilerInterval(interval);
+  public Duration setProfilerInterval(Duration interval) {
+    Duration oldInterval = config.setProfilerInterval(interval);
     profiler.reschedule();
+    return oldInterval;
   }
 
   public static InferredSpansProcessorBuilder builder() {
diff --git a/inferred-spans/src/main/java/io/opentelemetry/contrib/inferredspans/internal/InferredSpansConfiguration.java b/inferred-spans/src/main/java/io/opentelemetry/contrib/inferredspans/internal/InferredSpansConfiguration.java
index 819a5b8cf..4034c560d 100644
--- a/inferred-spans/src/main/java/io/opentelemetry/contrib/inferredspans/internal/InferredSpansConfiguration.java
+++ b/inferred-spans/src/main/java/io/opentelemetry/contrib/inferredspans/internal/InferredSpansConfiguration.java
@@ -84,8 +84,10 @@ public Duration getProfilingInterval() {
     return profilerInterval;
   }
 
-  public void setProfilerInterval(Duration profilerInterval) {
+  public Duration setProfilerInterval(Duration profilerInterval) {
+    Duration oldInterval = this.profilerInterval;
     this.profilerInterval = profilerInterval;
+    return oldInterval;
   }
 
   public Duration getProfilingDuration() {