--- a/src/basicio.cpp
+++ b/src/basicio.cpp
@@ -428,7 +428,7 @@
             // Minimum size for 1st block is 32kB
             long size  = std::max(32768 * (1 + need / 32768), size_);
             byte* data = (byte*)std::malloc(size);
-            std::memcpy(data, data_, size_);
+            memcpy(data, data_, size_);
             data_ = data;
             sizeAlloced_ = size;
             isMalloced_ = true;