diff --git a/storm/big/Ops.cpp b/storm/big/Ops.cpp
index 9567fcc..f9e8fe6 100644
--- a/storm/big/Ops.cpp
+++ b/storm/big/Ops.cpp
@@ -82,6 +82,10 @@ void Mul(BigBuffer& a, const BigBuffer& b, const BigBuffer& c, BigStack& stack)
     stack.UnmakeDistinct(a, aa);
 }
 
+void SetZero(BigBuffer& buffer) {
+    buffer.Clear();
+}
+
 void ToBinaryAppend(TSGrowableArray<uint8_t>& output, const BigBuffer& buffer) {
     for (uint32_t i = 0; i < buffer.Count() * 4; i++) {
         auto byte = buffer[i / 4] >> (8 * (i & 3));
diff --git a/storm/big/Ops.hpp b/storm/big/Ops.hpp
index d8f39a5..b39353f 100644
--- a/storm/big/Ops.hpp
+++ b/storm/big/Ops.hpp
@@ -21,6 +21,8 @@ void Mul(BigBuffer& a, const BigBuffer& b, uint64_t c);
 
 void Mul(BigBuffer& a, const BigBuffer& b, const BigBuffer& c, BigStack& stack);
 
+void SetZero(BigBuffer& buffer);
+
 void ToBinary(TSGrowableArray<uint8_t>& output, const BigBuffer& buffer);
 
 #endif
diff --git a/test/Big.cpp b/test/Big.cpp
index b049496..4571c37 100644
--- a/test/Big.cpp
+++ b/test/Big.cpp
@@ -420,3 +420,19 @@ TEST_CASE("SBigToBinaryBuffer", "[big]") {
         SBigDel(num);
     }
 }
+
+TEST_CASE("SetZero", "[big]") {
+    SECTION("sets buffer to zero") {
+        BigData* num;
+        SBigNew(&num);
+        SBigFromUnsigned(num, 0x12345678);
+
+        CHECK(num->Primary().Count() == 1);
+
+        SetZero(num->Primary());
+
+        CHECK(num->Primary().Count() == 0);
+
+        SBigDel(num);
+    }
+}