diff --git a/src/engine/build.sh b/src/engine/build.sh
index 4c4d0ec31..289eec5c0 100755
--- a/src/engine/build.sh
+++ b/src/engine/build.sh
@@ -462,6 +462,7 @@ object.cpp \
 option.cpp \
 output.cpp \
 parse.cpp \
+pathnt.cpp \
 pathsys.cpp \
 pathunix.cpp \
 regexp.cpp \
diff --git a/src/engine/jam.h b/src/engine/jam.h
index f9f139582..5d706dcb7 100644
--- a/src/engine/jam.h
+++ b/src/engine/jam.h
@@ -88,6 +88,7 @@
 #define SPLITPATH ';'
 #define MAXLINE (undefined__see_execnt_c)  /* max chars per command line */
 #define USE_EXECNT
+#define USE_PATHNT
 #define PATH_DELIM '\\'
 
 /* AS400 cross-compile from NT. */
@@ -131,6 +132,7 @@
 #define SPLITPATH ';'
 #define MAXLINE 996  /* max chars per command line */
 #define USE_EXECUNIX
+#define USE_PATHNT
 #define PATH_DELIM '\\'
 
 #endif  /* #ifdef MINGW */
@@ -145,6 +147,7 @@
 #define OSMAJOR "UNIX=true"
 #define USE_EXECUNIX
 #define USE_FILEUNIX
+#define USE_PATHUNIX
 #define PATH_DELIM '/'
 
 #ifdef _AIX
diff --git a/src/engine/pathnt.cpp b/src/engine/pathnt.cpp
index cff639bc9..a4cdc93c8 100644
--- a/src/engine/pathnt.cpp
+++ b/src/engine/pathnt.cpp
@@ -17,6 +17,8 @@
  */
 
 #include "jam.h"
+#ifdef USE_PATHNT
+
 #include "pathsys.h"
 #include "hash.h"
 
@@ -407,3 +409,5 @@ void path_done( void )
         hashdone( path_key_cache );
     }
 }
+
+#endif // USE_PATHNT
diff --git a/src/engine/pathunix.cpp b/src/engine/pathunix.cpp
index 2b2347c87..b4aab2382 100644
--- a/src/engine/pathunix.cpp
+++ b/src/engine/pathunix.cpp
@@ -16,6 +16,9 @@
  * pathunix.c - UNIX specific path manipulation support
  */
 
+#include "jam.h"
+#ifdef USE_PATHUNIX
+
 #include "pathsys.h"
 
 #include <stdlib.h>
@@ -84,3 +87,5 @@ OBJECT * path_as_key( OBJECT * path )
 void path_done( void )
 {
 }
+
+#endif // USE_PATHUNIX