diff --git a/lib/crypto/wscript b/lib/crypto/wscript
index 34f865346d4..040718d42df 100644
--- a/lib/crypto/wscript
+++ b/lib/crypto/wscript
@@ -1,4 +1,7 @@
 #!/usr/bin/env python
+from waflib import Options
+from waflib import Errors, Logs
+
 
 def options(opt):
     opt.add_option('--accel-aes',
@@ -7,3 +10,20 @@ def options(opt):
                    action="store",
                    dest='accel_aes',
                    default="none")
+
+
+def configure(conf):
+    if conf.CHECK_FUNCS('SHA1_Update'):
+        conf.DEFINE('SHA1_RENAME_NEEDED', 1)
+
+    #
+    # --aes-accel=XXX selects accelerated AES crypto library to use, if any.
+    # Default is none.
+    #
+    if Options.options.accel_aes.lower() == "intelaesni":
+        Logs.info("Attempting to compile with runtime-switchable x86_64 "
+                  "Intel AES instructions. WARNING - this is temporary.")
+    elif Options.options.accel_aes.lower() != "none":
+        raise Errors.WafError("--aes-accel=%s is not a valid option. Valid "
+                              "options are [none|intelaesni]" %
+                              Options.options.accel_aes)
diff --git a/lib/crypto/wscript_configure b/lib/crypto/wscript_configure
deleted file mode 100644
index 328ad1d2a56..00000000000
--- a/lib/crypto/wscript_configure
+++ /dev/null
@@ -1,15 +0,0 @@
-#!/usr/bin/env python
-from waflib import Options
-from waflib import Errors, Logs
-
-if conf.CHECK_FUNCS('SHA1_Update'):
-	conf.DEFINE('SHA1_RENAME_NEEDED', 1)
-
-#
-# --aes-accel=XXX selects accelerated AES crypto library to use, if any.
-# Default is none.
-#
-if Options.options.accel_aes.lower() == "intelaesni":
-        Logs.info("Attempting to compile with runtime-switchable x86_64 Intel AES instructions. WARNING - this is temporary.")
-elif Options.options.accel_aes.lower() != "none":
-        raise Errors.WafError('--aes-accel=%s is not a valid option. Valid options are [none|intelaesni]' % Options.options.accel_aes)