diff --git a/dev/unistd.h b/dev/unistd.h
index 411757f..6ff68be 100644
--- a/dev/unistd.h
+++ b/dev/unistd.h
@@ -4,6 +4,7 @@
 
 #define _CRT_SECURE_NO_WARNINGS
 #define _USE_MATH_DEFINES
+#define WIN32_LEAN_AND_MEAN
 
 #include <stdio.h>
 #include <math.h>
diff --git a/llmc/utils.h b/llmc/utils.h
index 74a06d2..e09bdce 100644
--- a/llmc/utils.h
+++ b/llmc/utils.h
@@ -7,6 +7,7 @@
 #ifndef UTILS_H
 #define UTILS_H
 
+#include <unistd.h>
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/train_gpt2.cu b/train_gpt2.cu
index 301cbea..7060923 100644
--- a/train_gpt2.cu
+++ b/train_gpt2.cu
@@ -1,11 +1,6 @@
 /*
 GPT-2 Transformer Neural Net training loop. See README.md for usage.
 */
-
-#ifdef _WIN32
-#define WIN32_LEAN_AND_MEAN
-#endif
-
 #include <unistd.h>
 #include <stdio.h>
 #include <stdlib.h>