diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d404674
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+.deps
+.objs
+parser
+tst
diff --git a/util.cpp b/util.cpp
index dd4d4dd..7b35f48 100644
--- a/util.cpp
+++ b/util.cpp
@@ -603,7 +603,7 @@ bool addrToHash160(
     static BN_CTX *ctx = 0;
     if(unlikely(!ctx)) {
         ctx = BN_CTX_new();
-        BN_CTX_init(ctx);
+        BN_CTX_free(ctx);
         sum = BN_new();
     }
 
@@ -726,7 +726,7 @@ void hash160ToAddr(
 
     if(!ctx) {
         ctx = BN_CTX_new();
-        BN_CTX_init(ctx);
+        BN_CTX_free(ctx);
 
         b58 = BN_new();
         num = BN_new();