diff --git a/exporters/prometheus/src/exporter_options.cc b/exporters/prometheus/src/exporter_options.cc
index 5d6b17318a..7f64a56413 100644
--- a/exporters/prometheus/src/exporter_options.cc
+++ b/exporters/prometheus/src/exporter_options.cc
@@ -15,7 +15,7 @@ namespace metrics
 
 inline const std::string GetPrometheusDefaultHttpEndpoint()
 {
-  constexpr char kPrometheusEndpointEnv[]     = "PROMETHEUS_EXPORTER_ENDPOINT";
+  constexpr char kPrometheusEndpointEnv[]     = "OTEL_CPP_PROMETHEUS_EXPORTER_ENDPOINT";
   constexpr char kPrometheusEndpointDefault[] = "localhost:9464";
 
   std::string endpoint;
@@ -27,7 +27,8 @@ inline const std::string GetPrometheusDefaultHttpEndpoint()
 
 inline bool GetPrometheusPopulateOtelScope()
 {
-  constexpr char kPrometheusPopulateOtelScope[] = "PROMETHEUS_EXPORTER_POPULATE_OTEL_SCOPE";
+  constexpr char kPrometheusPopulateOtelScope[] =
+      "OTEL_CPP_PROMETHEUS_EXPORTER_POPULATE_OTEL_SCOPE";
 
   bool setting;
   auto exists =
@@ -38,7 +39,8 @@ inline bool GetPrometheusPopulateOtelScope()
 
 inline bool GetPrometheusPopulateTargetInfo()
 {
-  constexpr char kPrometheusPopulateTargetInfo[] = "PROMETHEUS_EXPORTER_POPULATE_TARGET_INFO";
+  constexpr char kPrometheusPopulateTargetInfo[] =
+      "OTEL_CPP_PROMETHEUS_EXPORTER_POPULATE_TARGET_INFO";
 
   bool setting;
   auto exists = opentelemetry::sdk::common::GetBoolEnvironmentVariable(