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-rw-r--r--rts/RtsSymbols.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/rts/RtsSymbols.c b/rts/RtsSymbols.c
index fdfbba3d02..848553095b 100644
--- a/rts/RtsSymbols.c
+++ b/rts/RtsSymbols.c
@@ -107,7 +107,8 @@
RTS_WIN32_ONLY(SymI_HasProto(_imp___iob)) \
RTS_WIN64_ONLY(SymI_HasProto(__iob_func)) \
/* see Note [Symbols for MinGW's printf] */ \
- SymI_HasProto(_lock_file)
+ SymI_HasProto(_lock_file) \
+ SymI_HasProto(_unlock_file)
#define RTS_MINGW_COMPAT_SYMBOLS \
SymI_HasProto_deprecated(access) \