diff --git a/H5ChunkedWriter.cpp b/H5ChunkedWriter.cpp
index e466627..94cfa8c 100644
--- a/H5ChunkedWriter.cpp
+++ b/H5ChunkedWriter.cpp
@@ -212,7 +212,7 @@ hsize_t HDF5ChunkedWriter::prepare_storage_for_frame(size_t frame_index, size_t*
 
     // Expand the dataset if needed.
     if (relative_frame_index > current_dataset_size) {
-        current_dataset_size = expand_dataset(dataset, relative_frame_index, dataset_increase_step);
+        current_dataset_size = expand_dataset(dataset, relative_frame_index, config::dataset_increase_step);
     }
 
     // Keep track of the max index in this file - needed for shrinking the dataset at the end.
diff --git a/H5ChunkedWriter.hpp b/H5ChunkedWriter.hpp
index ecbf260..efc851f 100644
--- a/H5ChunkedWriter.hpp
+++ b/H5ChunkedWriter.hpp
@@ -5,14 +5,7 @@
 #include <sstream>
 #include <stdexcept>
 #include <iostream>
-
-namespace config
-{
-    auto dataset_type = H5::PredType::NATIVE_UINT8;
-    auto dataset_byte_order = H5T_ORDER_LE;
-    hsize_t dataset_increase_step = 1000;
-    hsize_t initial_dataset_size = 1000;
-}
+#include "config.hpp"
 
 hsize_t expand_dataset(const H5::DataSet& dataset, hsize_t frame_index, hsize_t dataset_increase_step);
 
diff --git a/config.cpp b/config.cpp
new file mode 100644
index 0000000..4352183
--- /dev/null
+++ b/config.cpp
@@ -0,0 +1,8 @@
+#include "config.hpp"
+
+namespace config {
+    H5::PredType dataset_type = H5::PredType::NATIVE_UINT8;
+    H5T_order_t dataset_byte_order = H5T_ORDER_LE;
+    hsize_t dataset_increase_step = 1000;
+    hsize_t initial_dataset_size = 1000;
+}
diff --git a/config.hpp b/config.hpp
new file mode 100644
index 0000000..b44743b
--- /dev/null
+++ b/config.hpp
@@ -0,0 +1,14 @@
+#include <H5Cpp.h>
+
+#ifndef CONFIG
+#define CONFIG
+
+namespace config
+{
+    extern H5::PredType dataset_type;
+    extern H5T_order_t dataset_byte_order;
+    extern hsize_t dataset_increase_step;
+    extern hsize_t initial_dataset_size;
+}
+
+#endif
\ No newline at end of file