diff --git a/var/spack/repos/builtin/packages/imagemagick/package.py b/var/spack/repos/builtin/packages/imagemagick/package.py
index 318ea03b896..848ac8c2545 100644
--- a/var/spack/repos/builtin/packages/imagemagick/package.py
+++ b/var/spack/repos/builtin/packages/imagemagick/package.py
@@ -38,8 +38,8 @@ class Imagemagick(AutotoolsPackage):
     depends_on("ghostscript-fonts", when="+ghostscript")
 
     # TODO: are these actually required?
-    depends_on("libsm")
-    depends_on("libtool")
+    depends_on("libsm", when="platform=linux")
+    depends_on("libtool", when="platform=linux")
 
     def configure_args(self):
         args = []