diff --git a/wlcs.spec b/wlcs.spec
index 917abe3..4d77592 100644
--- a/wlcs.spec
+++ b/wlcs.spec
@@ -1,29 +1,22 @@
-# List copied from gcc.spec
-# Current as of 13.1.1 (line 66)
-# Note that this covers all Fedora primary architectures.
+# Lists copied from gcc.spec
+# Current as of 13.2.1 (lines 66, 86, and 76, respectively).
+# Note that asan and ubsan are available on all Fedora primary architectures;
+# tsan is missing on i686 only.
 %ifarch %{ix86} x86_64 ppc ppc64 ppc64le ppc64p7 s390 s390x %{arm} aarch64
-%bcond asan 1
-%else
-%bcond asan 0
+%global arch_has_asan 1
 %endif
-
-# List copied from gcc.spec
-# Current as of 13.1.1 (line 86)
-# Note that this covers all Fedora primary architectures.
 %ifarch %{ix86} x86_64 ppc ppc64 ppc64le ppc64p7 s390 s390x %{arm} aarch64
-%bcond ubsan 1
-%else
-%bcond ubsan 0
+%global arch_has_ubsan 1
 %endif
-
-# List copied from gcc.spec
-# Current as of 13.1.1 (line 76)
 %ifarch x86_64 ppc64 ppc64le aarch64 s390x
-%bcond tsan 1
-%else
-%bcond tsan 0
+%global arch_has_tsan 1
 %endif
 
+# By default, enable sanitizers whenever they are available on the architecture.
+%bcond asan 0%{?arch_has_asan:1}
+%bcond ubsan 0%{?arch_has_ubsan:1}
+%bcond tsan 0%{?arch_has_tsan:1}
+
 Name:           wlcs
 Version:        1.6.0
 Release:        %autorelease