diff --git a/src/circuit.ts b/src/circuit.ts
index 9690975..6960421 100644
--- a/src/circuit.ts
+++ b/src/circuit.ts
@@ -2,6 +2,7 @@ import * as path from "path";
 import log from "log"
 
 const {wasm: wasmTester} = require("./vendors/circom_tester")
+const {c: cTester} = require("./vendors/circom_tester")
 
 import {CircuitConfig, Networks, Witness, ZK_PROOF} from "./types";
 import {genGrothZKey, genPlonkZKey, genVerificationKey} from "./utils/zKey";
@@ -28,11 +29,18 @@ export class Circuit {
              fs.mkdirSync(this._circuitConfig.outputDir, {recursive:true})
         }
 
-        this._wasmTester = await wasmTester(this._circuitConfig.inputFilePath, {
-            output: this._circuitConfig.outputDir,
-            ...this._circuitConfig.compileOptions
-        })
-
+        if(this._circuitConfig.compilationMode =='wasm'){
+            this._wasmTester = await wasmTester(this._circuitConfig.inputFilePath, {
+                output: this._circuitConfig.outputDir,
+                ...this._circuitConfig.compileOptions
+            })
+        } else if (this._circuitConfig.compilationMode =='c'){
+            this._wasmTester = await cTester(this._circuitConfig.inputFilePath, {
+                output: this._circuitConfig.outputDir,
+                ...this._circuitConfig.compileOptions
+            })           
+        }
+    
        
     }
 
diff --git a/src/configParser.ts b/src/configParser.ts
index 37e7769..59ef8a4 100644
--- a/src/configParser.ts
+++ b/src/configParser.ts
@@ -144,6 +144,7 @@ export class ConfigParser {
         zKeyPath: path.join(cktOutputDir, "circuit_final.zkey"), // DO NOT change the names
         vKeyPath: path.join(cktOutputDir, "verification_key.json"), // DO NOT change the names
         r1csPath: path.join(cktOutputDir, `${cktName}.r1cs`),
+        compilationMode: c.compilationMode? c.compilationMode : "wasm",
         compileOptions: {
           include: [],
           snarkType: c.proofType ? c.proofType : "groth16",
diff --git a/src/index.ts b/src/index.ts
index a90985e..9b98345 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1 +1 @@
-export { default as CircomJS } from "./circomJs"
\ No newline at end of file
+export { default as CircomJS } from "./circomJs"
diff --git a/src/types.ts b/src/types.ts
index 4993e13..f71f31d 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -65,6 +65,7 @@ export type CircuitConfig = {
     zKeyPath: string;
     vKeyPath: string;
     compileOptions: CompileOptions;
+    compilationMode: CompilationMode;
     r1csPath:string
 }
 
diff --git a/src/vendors/circom_tester/c/tester.js b/src/vendors/circom_tester/c/tester.js
index 048f7cb..a1b421b 100644
--- a/src/vendors/circom_tester/c/tester.js
+++ b/src/vendors/circom_tester/c/tester.js
@@ -55,7 +55,7 @@ async function  c_tester(circomInput, _options) {
 	    assert(false,"Cannot set recompile to false if the "+jsPath+" folder does not exist");
 	}
     }
-    return new CTester(options.output, baseName, run);
+    return new CTester(options.output, baseName);
 }
 
 async function compile (baseName, fileName, options) {
@@ -76,9 +76,9 @@ async function compile (baseName, fileName, options) {
     if (options.O === 0) flags += "--O0 ";
     if (options.O === 1) flags += "--O1 ";
     if (options.verbose) flags += "--verbose ";
-
+    let b;
     try {
-	let b = await exec("circom " + flags + fileName);
+	b = await exec("circom " + flags + fileName);
 	if (options.verbose) {
             console.log(b.stdout);
 	}
@@ -95,10 +95,9 @@ async function compile (baseName, fileName, options) {
 
 class CTester {
 
-    constructor(dir, baseName, witnessCalculator) {
+    constructor(dir, baseName) {
         this.dir=dir;
         this.baseName = baseName;
-        this.witnessCalculator = witnessCalculator;
     }
 
     async release() {
diff --git a/tests/circomJS.test.ts b/tests/circomJS.test.ts
index c90fc80..ab268dc 100644
--- a/tests/circomJS.test.ts
+++ b/tests/circomJS.test.ts
@@ -22,7 +22,7 @@ const jsonConfig = `
              "cID": "circ1000constraints",
              "fileName": "circ1000constraints.circom",
              "proofType": "plonk",
-             "compilationMode": "wasm"
+             "compilationMode": "c"
            }
          ]
        }
diff --git a/tests/circuit.test.ts b/tests/circuit.test.ts
index f8039f8..9a0d6a8 100644
--- a/tests/circuit.test.ts
+++ b/tests/circuit.test.ts
@@ -24,7 +24,7 @@ const jsonConfig = `
              "cID": "circ1000constraints",
              "fileName": "circ1000constraints.circom",
              "proofType": "plonk",
-             "compilationMode": "wasm"
+             "compilationMode": "c"
            }
          ]
        }
diff --git a/tests/configParser.test.ts b/tests/configParser.test.ts
index 8eade87..bb52a09 100644
--- a/tests/configParser.test.ts
+++ b/tests/configParser.test.ts
@@ -26,7 +26,7 @@ describe("ConfigParser test", () => {
                      "cID": "circ1000constraints",
                      "fileName": "circ1000constraints.circom",
                      "proofType": "groth16",
-                     "compilationMode": "wasm"
+                     "compilationMode": "c"
                    }
                  ]
                }
diff --git a/tests/data/circuit.config.json b/tests/data/circuit.config.json
index bab67fd..1446b68 100644
--- a/tests/data/circuit.config.json
+++ b/tests/data/circuit.config.json
@@ -16,7 +16,7 @@
              "cID": "circ1000constraints",
              "fileName": "circ1000constraints.circom",
              "proofType": "plonk",
-             "compilationMode": "wasm"
+             "compilationMode": "c"
            }
          ]
        },