diff --git a/src/umpire/ResourceManager.cpp b/src/umpire/ResourceManager.cpp
index ee58038a6..6ba4c699c 100644
--- a/src/umpire/ResourceManager.cpp
+++ b/src/umpire/ResourceManager.cpp
@@ -64,7 +64,7 @@ ResourceManager::ResourceManager()
 {
   UMPIRE_LOG(Debug, "() entering");
 
-  const char* env_enable_log{getenv("UMPIRE_LOG_LEVEL")};
+  const char* env_enable_log{std::getenv("UMPIRE_LOG_LEVEL")};
   const bool enable_log{env_enable_log != nullptr};
 
   util::initialize_io(enable_log);
diff --git a/src/umpire/event/event.hpp b/src/umpire/event/event.hpp
index b61502f0e..1daac7467 100644
--- a/src/umpire/event/event.hpp
+++ b/src/umpire/event/event.hpp
@@ -8,6 +8,7 @@
 #define UMPIRE_event_HPP
 
 #include <cstdint>
+#include <cstdlib>
 #include <map>
 #include <sstream>
 #include <string>
@@ -57,9 +58,9 @@ namespace umpire {
 namespace event {
 
 namespace {
-static const char* replay_env{getenv("UMPIRE_REPLAY")};
+static const char* replay_env{std::getenv("UMPIRE_REPLAY")};
 static const bool enable_replay{(replay_env != NULL)};
-static const char* event_env{getenv("UMPIRE_EVENTS")};
+static const char* event_env{std::getenv("UMPIRE_EVENTS")};
 static const bool enable_event{(event_env != NULL)};
 static const bool event_build_enabled{enable_replay || enable_event};
 } // namespace
diff --git a/src/umpire/util/Logger.cpp b/src/umpire/util/Logger.cpp
index 3c1a4d14f..e95cbe297 100644
--- a/src/umpire/util/Logger.cpp
+++ b/src/umpire/util/Logger.cpp
@@ -33,7 +33,7 @@ Logger::Logger() noexcept
       m_is_enabled{false, false, false, false}
 {
   message::Level level{defaultLevel};
-  const char* enval = getenv(env_name);
+  const char* enval = std::getenv(env_name);
 
   if (enval) {
     for (int i = 0; i < message::Num_Levels; ++i) {
diff --git a/src/umpire/util/Macros.hpp b/src/umpire/util/Macros.hpp
index fc3ee0805..a7ad60756 100644
--- a/src/umpire/util/Macros.hpp
+++ b/src/umpire/util/Macros.hpp
@@ -36,7 +36,7 @@
       plog = axom::slic::Logger::getActiveLogger();                                                     \
       axom::slic::message::Level level;                                                                 \
       level = axom::slic::message::Level::Error;                                                        \
-      char* enval = getenv(env_name.c_str());                                                           \
+      char* enval = std::getenv(env_name.c_str());                                                      \
       if (enval != NULL) {                                                                              \
         for (int i = 0; i < axom::slic::message::Level::Num_Levels; ++i) {                              \
           if (strcasecmp(enval, axom::slic::message::MessageLevelName[i].c_str()) == 0) {               \
diff --git a/src/umpire/util/backtrace.inl b/src/umpire/util/backtrace.inl
index 1f4abf333..61ba90f16 100644
--- a/src/umpire/util/backtrace.inl
+++ b/src/umpire/util/backtrace.inl
@@ -41,7 +41,7 @@ bool backtrace_enabled()
   static bool initialized{false};
 
   if (!initialized) {
-    const char* enval{getenv("UMPIRE_BACKTRACE")};
+    const char* enval{std::getenv("UMPIRE_BACKTRACE")};
     if (enval) {
       std::string env_str{enval};
       std::transform(env_str.begin(), env_str.end(), env_str.begin(), ::toupper);
diff --git a/src/umpire/util/io.cpp b/src/umpire/util/io.cpp
index 006886f18..62b726a67 100644
--- a/src/umpire/util/io.cpp
+++ b/src/umpire/util/io.cpp
@@ -7,8 +7,7 @@
 
 #include "umpire/util/io.hpp"
 
-#include <stdlib.h> // for getenv()
-
+#include <cstdlib>
 #include <fstream>
 #include <iostream>
 #include <ostream>