diff --git a/src/common/kiwix/indexer.h b/src/common/kiwix/indexer.h
index 287a3f9a3..a80fa84a9 100644
--- a/src/common/kiwix/indexer.h
+++ b/src/common/kiwix/indexer.h
@@ -30,6 +30,8 @@
 
 #ifdef _WIN32
 #include <Windows.h>
+#else
+#include <unistd.h>
 #endif
 
 #include <pthread.h>
diff --git a/src/common/pathTools.cpp b/src/common/pathTools.cpp
index 65cd4da6a..2c1824249 100644
--- a/src/common/pathTools.cpp
+++ b/src/common/pathTools.cpp
@@ -26,6 +26,11 @@
 #include <windows.h>
 #endif
 
+#ifdef _WIN32
+#else
+#include <unistd.h>
+#endif
+
 #ifndef PATH_MAX
 #define PATH_MAX 1024
 #endif