diff --git a/mongoose.h b/mongoose.h
index c198c8e5..35fde3b6 100644
--- a/mongoose.h
+++ b/mongoose.h
@@ -479,6 +479,10 @@ extern int SockSet(SOCKET hSock, int Type, int Prop, void *pbuf, int size);
 #define MG_ENABLE_DIRLIST 1
 #endif
 
+#ifndef MG_PATH_MAX
+#define MG_PATH_MAX FILENAME_MAX
+#endif
+
 #endif
 
 
@@ -544,9 +548,11 @@ typedef enum { false = 0, true = 1 } bool;
 
 typedef int socklen_t;
 #define MG_DIRSEP '\\'
-#ifndef PATH_MAX
-#define PATH_MAX MAX_PATH
+
+#ifndef MG_PATH_MAX
+#define MG_PATH_MAX FILENAME_MAX
 #endif
+
 #ifndef EINPROGRESS
 #define EINPROGRESS WSAEINPROGRESS
 #endif
diff --git a/src/arch_unix.h b/src/arch_unix.h
index 7eaeeeb1..eaf1876d 100644
--- a/src/arch_unix.h
+++ b/src/arch_unix.h
@@ -52,4 +52,8 @@
 #define MG_ENABLE_DIRLIST 1
 #endif
 
+#ifndef MG_PATH_MAX
+#define MG_PATH_MAX FILENAME_MAX
+#endif
+
 #endif
diff --git a/src/arch_win32.h b/src/arch_win32.h
index 2616156a..ec3b383b 100644
--- a/src/arch_win32.h
+++ b/src/arch_win32.h
@@ -62,9 +62,11 @@ typedef enum { false = 0, true = 1 } bool;
 
 typedef int socklen_t;
 #define MG_DIRSEP '\\'
-#ifndef PATH_MAX
-#define PATH_MAX MAX_PATH
+
+#ifndef MG_PATH_MAX
+#define MG_PATH_MAX FILENAME_MAX
 #endif
+
 #ifndef EINPROGRESS
 #define EINPROGRESS WSAEINPROGRESS
 #endif