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-rw-r--r--src/compiler/GF/CompileOne.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/compiler/GF/CompileOne.hs b/src/compiler/GF/CompileOne.hs
index e873d6119..117a6b9a5 100644
--- a/src/compiler/GF/CompileOne.hs
+++ b/src/compiler/GF/CompileOne.hs
@@ -35,7 +35,7 @@ type OneOutput = (Maybe FullPath,CompiledModule)
type CompiledModule = Module
compileOne, reuseGFO, useTheSource ::
- (Output m,ErrorMonad m,MonadIO m) =>
+ (Output m,ErrorMonad m,MonadIO m, MonadFail m) =>
Options -> Grammar -> FullPath -> m OneOutput
-- | Compile a given source file (or just load a .gfo file),