diff --git a/dlls/crypt32/rootstore.c b/dlls/crypt32/rootstore.c
index f795181..fb4926a 100644
--- a/dlls/crypt32/rootstore.c
+++ b/dlls/crypt32/rootstore.c
@@ -18,6 +18,7 @@
 #include "config.h"
 #include <stdarg.h>
 #include <stdio.h>
+#include <stdlib.h> /* getenv */
 #include <sys/types.h>
 #ifdef HAVE_SYS_STAT_H
 #include <sys/stat.h>
@@ -916,6 +917,11 @@ static void read_trusted_roots_from_known_locations(HCERTSTORE store)
 
         for (i = 0; !ret && i < ARRAY_SIZE(CRYPT_knownLocations); i++)
             ret = import_certs_from_path(CRYPT_knownLocations[i], from, TRUE);
+
+        char *nix_cert_file = getenv("NIX_SSL_CERT_FILE");
+        if (nix_cert_file != NULL)
+            ret = import_certs_from_path(nix_cert_file, from, TRUE);
+
         check_and_store_certs(from, store);
     }
     CertCloseStore(from, 0);