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-rw-r--r--includes/RtsExternal.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/includes/RtsExternal.h b/includes/RtsExternal.h
index 41c608dbf2..6c1f71e3d1 100644
--- a/includes/RtsExternal.h
+++ b/includes/RtsExternal.h
@@ -44,6 +44,7 @@ extern pid_t forkProcess(HsStablePtr *entry);
extern HsBool rtsSupportsBoundThreads(void);
extern StgInt newSpark (StgRegTable *reg, StgClosure *p);
extern void stopTimer(void);
+extern unsigned int n_capabilities;
/* grimy low-level support functions defined in StgPrimFloat.c */
extern StgDouble __encodeDouble (I_ size, StgByteArray arr, I_ e);