diff --git a/src/shared/configuration/config.ts b/src/shared/configuration/config.ts
index 90d137cd..b88bbb32 100644
--- a/src/shared/configuration/config.ts
+++ b/src/shared/configuration/config.ts
@@ -109,9 +109,6 @@ export class ApplicationInsightsConfig {
                 options.instrumentationOptions
             );
             this.resource = Object.assign(this.resource, options.resource);
-            if (typeof(options.samplingRatio) === "number") {
-                this.samplingRatio = options.samplingRatio;
-            }
             this.samplingRatio = options.samplingRatio !== undefined ? options.samplingRatio : this.samplingRatio;
 
             // Set console logging level from env var
diff --git a/src/shim/shim-config.ts b/src/shim/shim-config.ts
index eca8d03e..efbef798 100644
--- a/src/shim/shim-config.ts
+++ b/src/shim/shim-config.ts
@@ -151,8 +151,12 @@ class Config implements IConfig {
             ...options.instrumentationOptions,
             console: { enabled: false },
         };
-        if (this.samplingPercentage !== undefined) {
-            options.samplingRatio = this.samplingPercentage / 100;
+        const samplingRatio = this.samplingPercentage / 100;
+        if (samplingRatio >= 0 && samplingRatio <= 1) {
+            options.samplingRatio = samplingRatio;
+        } else {
+            options.samplingRatio = 1;
+            this._configWarnings.push(`Sampling percentage should be between 0 and 100. Defaulting to 100.`);
         }
         options.instrumentationOptions = {
             ...options.instrumentationOptions,