diff --git a/src/eei.cpp b/src/eei.cpp
index 24a1f3246..c64e0cebb 100644
--- a/src/eei.cpp
+++ b/src/eei.cpp
@@ -132,6 +132,10 @@ namespace hera {
       ensureCondition(gas >= 0, ArgumentOutOfRange, "Negative gas supplied.");
 
       takeGas(gas);
+
+      // FIXME: this may overflow
+      heraAssert((ffsl(gas) + ffsl(memory.size()) <= 64), "Memory gas calculation overflow."); //may need to find alternative to ffsl for cross-libc portability
+      takeGas(gas * memory.size() / GasSchedule::memoryPageSize * GasSchedule::memoryCostPerPage + 1); //round gas cost up
   }
 
   int64_t EthereumInterface::eeiGetGasLeft()
diff --git a/src/eei.h b/src/eei.h
index c79d8cd6b..623382d30 100644
--- a/src/eei.h
+++ b/src/eei.h
@@ -163,6 +163,9 @@ class EthereumInterface {
 };
 
 struct GasSchedule {
+  static constexpr unsigned memoryPageSize = 65536;
+  static constexpr unsigned memoryCostPerPage = 1;
+
   static constexpr unsigned storageLoad = 200;
   static constexpr unsigned storageStoreCreate = 20000;
   static constexpr unsigned storageStoreChange = 5000;