diff --git a/Project.toml b/Project.toml
index 2a74776..db0655f 100644
--- a/Project.toml
+++ b/Project.toml
@@ -3,7 +3,7 @@ uuid = "7a57a42e-76ec-4ea3-a279-07e840d6d9cf"
 keywords = ["probablistic programming"]
 license = "MIT"
 desc = "Common interfaces for probabilistic programming"
-version = "0.9.0"
+version = "0.10.0"
 
 [deps]
 AbstractMCMC = "80f14c24-f653-4e6a-9b94-39d6b0f70001"
diff --git a/src/AbstractPPL.jl b/src/AbstractPPL.jl
index 33fa417..f121b97 100644
--- a/src/AbstractPPL.jl
+++ b/src/AbstractPPL.jl
@@ -18,7 +18,7 @@ export VarName,
 
 
 # Abstract model functions
-export AbstractProbabilisticProgram, condition, decondition, logdensityof, densityof, AbstractContext, evaluate!!
+export AbstractProbabilisticProgram, condition, decondition, fix, unfix, logdensityof, densityof, AbstractContext, evaluate!!
 
 # Abstract traces
 export AbstractModelTrace
diff --git a/src/abstractprobprog.jl b/src/abstractprobprog.jl
index fdd6815..a2bcb0d 100644
--- a/src/abstractprobprog.jl
+++ b/src/abstractprobprog.jl
@@ -89,7 +89,7 @@ function fix end
 
 Remove any fixed parameters from the model `model`, returning a new model without the fixed parameters.
 
-This function reverses the effect of `fix()` by removing parameter constraints that were previously set.
+This function reverses the effect of `fix` by removing parameter constraints that were previously set.
 It returns a new model where all previously fixed parameters are allowed to vary according to their 
 original distributions in the model.