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-rw-r--r--lib/system/gc_ms.nim3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/system/gc_ms.nim b/lib/system/gc_ms.nim
index 2973d1b9a..d1aecb7a2 100644
--- a/lib/system/gc_ms.nim
+++ b/lib/system/gc_ms.nim
@@ -10,7 +10,8 @@
 # A simple mark&sweep garbage collector for Nim. Define the
 # symbol ``gcUseBitvectors`` to generate a variant of this GC.
 
-import arch
+when defined(nimCoroutines):
+  import arch
 
 {.push profiler:off.}