diff --git a/exp-sgcheck/tests/is_arch_supported b/exp-sgcheck/tests/is_arch_supported
index c2ae871ac..818cc6167 100755
--- a/exp-sgcheck/tests/is_arch_supported
+++ b/exp-sgcheck/tests/is_arch_supported
@@ -1,7 +1,7 @@
 #!/bin/sh
 #
-# Not all architectures are supported by exp-ptr. Currently, PowerPC, s390x
-# and ARM are not supported and will fail these tests as follows:
+# Not all architectures are supported by exp-ptr. Currently, PowerPC, s390x,
+# MIPS and ARM are not supported and will fail these tests as follows:
 # WARNING: exp-ptrcheck on <blah> platforms: stack and global array
 # WARNING: checking is not currently supported.  Only heap checking is
 # WARNING: supported.
@@ -9,7 +9,7 @@
 # So we use this script to prevent these tests from running on unsupported
 # architectures.
 
-case `uname -i` in
+case `uname -m` in
   ppc*|arm*|s390x|mips*) exit 1;;
   *)         exit 0;;
 esac