diff --git a/mongoose.h b/mongoose.h
index 0ae3de3b..53821660 100644
--- a/mongoose.h
+++ b/mongoose.h
@@ -418,8 +418,10 @@ typedef enum { false = 0, true = 1 } bool;
 #ifndef __cplusplus
 #define snprintf _snprintf
 #define vsnprintf _vsnprintf
+#ifndef strdup  // For MSVC with _DEBUG, see #1359
 #define strdup(x) _strdup(x)
 #endif
+#endif
 
 typedef unsigned suseconds_t;
 typedef int socklen_t;
diff --git a/src/arch_win32.h b/src/arch_win32.h
index a14343f0..a9183227 100644
--- a/src/arch_win32.h
+++ b/src/arch_win32.h
@@ -51,8 +51,10 @@ typedef enum { false = 0, true = 1 } bool;
 #ifndef __cplusplus
 #define snprintf _snprintf
 #define vsnprintf _vsnprintf
+#ifndef strdup  // For MSVC with _DEBUG, see #1359
 #define strdup(x) _strdup(x)
 #endif
+#endif
 
 typedef unsigned suseconds_t;
 typedef int socklen_t;