diff --git a/scripts/config.py b/scripts/config.py
index 8fda2e2aab..0d65e771b0 100755
--- a/scripts/config.py
+++ b/scripts/config.py
@@ -599,12 +599,16 @@ class CryptoConfig(Config):
                               for (active, name, value, section)
                               in self.configfile.parse_file()})
 
-    def set(self, name, value=None):
+    def set(self, name, value='1'):
         if name in UNSUPPORTED_FEATURE:
             raise ValueError(f'Feature is unsupported: \'{name}\'')
         if name in UNSTABLE_FEATURE:
             raise ValueError(f'Feature is unstable: \'{name}\'')
 
+        # The default value in the crypto config is '1'
+        if not value:
+            value = '1'
+
         if name not in self.settings:
             self.configfile.templates.append((name, '', '#define ' + name + ' '))
 
@@ -655,6 +659,10 @@ class MultiConfig(Config):
             if name in UNSTABLE_FEATURE:
                 raise ValueError(f'Feature is unstable: \'{name}\'')
 
+            # The default value in the crypto config is '1'
+            if not value:
+                value = '1'
+
         if name not in self.settings:
             configfile.templates.append((name, '', '#define ' + name + ' '))