diff --git a/runtime/Makefile.am b/runtime/Makefile.am
index 9d3faa952..d74749fb7 100644
--- a/runtime/Makefile.am
+++ b/runtime/Makefile.am
@@ -94,13 +94,8 @@ safe_math_macros.h: safe_math_macros.m4
 safe_math_macros_notmp.h: safe_math_macros_notmp.m4
 	$(M4) < $< > $@
 
-# We distribute, but do not build, the Windows support files in EXTRA_DIST.
 EXTRA_DIST = \
-	CMakeLists.txt \
-	windows/_rand48.c \
-	windows/lrand48.c \
-	windows/rand48.h \
-	windows/srand48.c
+	CMakeLists.txt
 
 ###############################################################################
 
diff --git a/runtime/Makefile.in b/runtime/Makefile.in
index 94345862e..5a7cb1340 100644
--- a/runtime/Makefile.in
+++ b/runtime/Makefile.in
@@ -404,14 +404,8 @@ BUILT_SOURCES = \
 CLEANFILES = \
 	$(BUILT_SOURCES)
 
-
-# We distribute, but do not build, the Windows support files in EXTRA_DIST.
 EXTRA_DIST = \
-	CMakeLists.txt \
-	windows/_rand48.c \
-	windows/lrand48.c \
-	windows/rand48.h \
-	windows/srand48.c
+	CMakeLists.txt
 
 all: $(BUILT_SOURCES)
 	$(MAKE) $(AM_MAKEFLAGS) all-am