diff --git a/browser/themes/linux/Makefile.in b/browser/themes/linux/Makefile.in
deleted file mode 100644
index bf6869d2c09..00000000000
--- a/browser/themes/linux/Makefile.in
+++ /dev/null
@@ -1,7 +0,0 @@
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-ICON_FILES := ../shared/icon.png
-ICON_DEST = $(FINAL_TARGET)/extensions/{972ce4c6-7e08-4474-a285-3208198ce6fd}
-INSTALL_TARGETS += ICON
diff --git a/browser/themes/moz.build b/browser/themes/moz.build
index 5040c10c15c..cca815ff997 100644
--- a/browser/themes/moz.build
+++ b/browser/themes/moz.build
@@ -12,3 +12,5 @@ elif toolkit in ('gtk2', 'gtk3', 'qt'):
     DIRS += ['linux']
 else:
     DIRS += ['windows']
+
+FINAL_TARGET_FILES.extensions['{972ce4c6-7e08-4474-a285-3208198ce6fd}'] += ['shared/icon.png']
diff --git a/browser/themes/osx/Makefile.in b/browser/themes/osx/Makefile.in
deleted file mode 100644
index bf6869d2c09..00000000000
--- a/browser/themes/osx/Makefile.in
+++ /dev/null
@@ -1,7 +0,0 @@
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-ICON_FILES := ../shared/icon.png
-ICON_DEST = $(FINAL_TARGET)/extensions/{972ce4c6-7e08-4474-a285-3208198ce6fd}
-INSTALL_TARGETS += ICON
diff --git a/browser/themes/windows/Makefile.in b/browser/themes/windows/Makefile.in
deleted file mode 100644
index bf6869d2c09..00000000000
--- a/browser/themes/windows/Makefile.in
+++ /dev/null
@@ -1,7 +0,0 @@
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-ICON_FILES := ../shared/icon.png
-ICON_DEST = $(FINAL_TARGET)/extensions/{972ce4c6-7e08-4474-a285-3208198ce6fd}
-INSTALL_TARGETS += ICON