2 files changed, 8 insertions, 0 deletions
diff --git a/src/binaryen-c.cpp b/src/binaryen-c.cpp
index c273a3af4..21e650650 100644
--- a/src/binaryen-c.cpp
+++ b/src/binaryen-c.cpp
@@ -5878,6 +5878,10 @@ BinaryenType BinaryenFunctionGetVar(BinaryenFunctionRef func,
   assert(index < vars.size());
   return vars[index].getID();
 }
+BinaryenIndex BinaryenFunctionAddVar(BinaryenFunctionRef func,
+                                     BinaryenType type) {
+  return Builder::addVar((Function*)func, (Type)type);
+}
 BinaryenIndex BinaryenFunctionGetNumLocals(BinaryenFunctionRef func) {
   return ((Function*)func)->getNumLocals();
 }
diff --git a/src/binaryen-c.h b/src/binaryen-c.h
index 82de2dae9..b12cdc213 100644
--- a/src/binaryen-c.h
+++ b/src/binaryen-c.h
@@ -3197,6 +3197,10 @@ BINARYEN_API BinaryenIndex BinaryenFunctionGetNumVars(BinaryenFunctionRef func);
 // specified `Function`.
 BINARYEN_API BinaryenType BinaryenFunctionGetVar(BinaryenFunctionRef func,
                                                  BinaryenIndex index);
+// Appends a local variable to the specified `Function`, returning its
+// index.
+BINARYEN_API BinaryenIndex BinaryenFunctionAddVar(BinaryenFunctionRef func,
+                                                  BinaryenType type);
 // Gets the number of locals within the specified function. Includes parameters.
 BINARYEN_API BinaryenIndex
 BinaryenFunctionGetNumLocals(BinaryenFunctionRef func);