diff --git a/distrib/msw/tmake/filelist.txt b/distrib/msw/tmake/filelist.txt
index 00873e8e96..49ee59985b 100644
--- a/distrib/msw/tmake/filelist.txt
+++ b/distrib/msw/tmake/filelist.txt
@@ -376,7 +376,7 @@ fontutil.cpp	Unix	NotCocoa,NotMac,NotMGL,NotMicro
 gsocket.c	Unix	Base,NotMac
 mimetype.cpp	Unix	Base,NotMac,NotMicro
 snglinst.cpp	Unix	Base
-taskbarx11.cpp	Unix	NotMac,NotMGL,NotMicro
+taskbarx11.cpp	Unix	NotCocoa,NotMac,NotMGL,NotMicro
 threadpsx.cpp	Unix	Base,NotMac
 utilsunx.cpp	Unix	Base
 utilsx11.cpp	Unix	NotMac,NotMGL,NotMicro
diff --git a/src/cocoa/files.lst b/src/cocoa/files.lst
index 615e80fb78..2cf93709ea 100644
--- a/src/cocoa/files.lst
+++ b/src/cocoa/files.lst
@@ -232,7 +232,6 @@ ALL_SOURCES = \
 		unix/gsocket.c \
 		unix/mimetype.cpp \
 		unix/snglinst.cpp \
-		unix/taskbarx11.cpp \
 		unix/threadpsx.cpp \
 		unix/utilsunx.cpp \
 		unix/utilsx11.cpp \
@@ -840,7 +839,6 @@ UNIXOBJS = \
 		gsocket.o \
 		mimetype.o \
 		snglinst.o \
-		taskbarx11.o \
 		threadpsx.o \
 		utilsunx.o \
 		utilsx11.o