diff --git a/sapi/cli/ps_title.c b/sapi/cli/ps_title.c
index 730a31b11e7..28830c9082a 100644
--- a/sapi/cli/ps_title.c
+++ b/sapi/cli/ps_title.c
@@ -128,7 +128,7 @@ static char** save_argv;
  * This holds the 'locally' allocated environ from the save_ps_args method.
  * This is subsequently free'd at exit.
  */
-static char** new_environ;
+static char** frozen_environ, **new_environ;
 
 /*
  * Call this method early, before any code has used the original argv passed in
@@ -182,7 +182,8 @@ char** save_ps_args(int argc, char** argv)
          * move the environment out of the way
          */
         new_environ = (char **) malloc((i + 1) * sizeof(char *));
-        if (!new_environ)
+        frozen_environ = (char **) malloc((i + 1) * sizeof(char *));
+        if (!new_environ || !frozen_environ)
             goto clobber_error;
         for (i = 0; environ[i] != NULL; i++)
         {
@@ -192,6 +193,7 @@ char** save_ps_args(int argc, char** argv)
         }
         new_environ[i] = NULL;
         environ = new_environ;
+        memcpy((char *)frozen_environ, (char *)new_environ, sizeof(char *) * (i + 1));
 
     }
 #endif /* PS_USE_CLOBBER_ARGV */
@@ -409,9 +411,9 @@ void cleanup_ps_args(char **argv)
 #ifdef PS_USE_CLOBBER_ARGV
         {
             int i;
-            for (i = 0; new_environ[i] != NULL; i++)
-                free(new_environ[i]);
-            free(new_environ);
+            for (i = 0; frozen_environ[i] != NULL; i++)
+                free(frozen_environ[i]);
+            free(frozen_environ);
         }
 #endif /* PS_USE_CLOBBER_ARGV */
 
diff --git a/sapi/cli/tests/bug64544.phpt b/sapi/cli/tests/bug64544.phpt
new file mode 100644
index 00000000000..cc49545c16f
--- /dev/null
+++ b/sapi/cli/tests/bug64544.phpt
@@ -0,0 +1,20 @@
+--TEST--
+Bug #64544 (Valgrind warnings after using putenv)
+--SKIPIF--
+<?php
+if (substr(PHP_OS, 0, 3) == "WIN") {
+	die("skip non windows test");
+}
+?>
+--FILE--
+<?php
+
+putenv("HOME=/tmp");
+var_dump(getenv("HOME"));
+
+putenv("FOO=BAR");
+var_dump(getenv("FOO"));
+?>
+--EXPECTF--
+string(4) "/tmp"
+string(3) "BAR"