diff --git a/numerics/sin_cos.cpp b/numerics/sin_cos.cpp
index 4096065b23..88db80cd70 100644
--- a/numerics/sin_cos.cpp
+++ b/numerics/sin_cos.cpp
@@ -356,10 +356,6 @@ Value __cdecl Sin(Argument const θ) {
   }
 }
 
-namespace OSACA_assumptions {
-constexpr std::int64_t quadrant = 1;
-}  // namespace OSACA_assumptions
-
 #if PRINCIPIA_INLINE_SIN_COS
 FORCE_INLINE(inline)
 #endif