diff --git a/src/spandrel/architectures/Compact/__init__.py b/src/spandrel/architectures/Compact/__init__.py
index 1f7c21ce..32378812 100644
--- a/src/spandrel/architectures/Compact/__init__.py
+++ b/src/spandrel/architectures/Compact/__init__.py
@@ -28,7 +28,8 @@ def is_square(n: int) -> bool:
             return int(math.sqrt(x // c)), c
 
     raise AssertionError(
-        f"Expected output channels to be either 1, 3, or 4. Could not find a a pair (s, o) such that s*s*o = {x}"
+        f"Expected output channels to be either 1, 3, or 4."
+        f" Could not find a pair (s, o) such that s*s*o = {x}"
     )