diff --git a/artiq/compiler/embedding.py b/artiq/compiler/embedding.py
index f854686f8..233d2b8fb 100644
--- a/artiq/compiler/embedding.py
+++ b/artiq/compiler/embedding.py
@@ -310,7 +310,9 @@ class ASTSynthesizer:
         if len(value) > 0:
             v = value[0]
             is_T = True
-            if isinstance(v, int):
+            if isinstance(v, bool):
+                is_T = False
+            elif isinstance(v, int):
                 T = int
             elif isinstance(v, float):
                 T = float