diff --git a/racket/src/ac/ubsan_arg.m4 b/racket/src/ac/ubsan_arg.m4
index 4aa7b36036..6805197317 100644
--- a/racket/src/ac/ubsan_arg.m4
+++ b/racket/src/ac/ubsan_arg.m4
@@ -1 +1 @@
-AC_ARG_ENABLE(ubsan,   [  --enable-ubsan          compile with -fsanitize=undefined)])
+AC_ARG_ENABLE(ubsan,   [  --enable-ubsan          compile with -fsanitize=undefined])
diff --git a/racket/src/cfg-racket b/racket/src/cfg-racket
index 87c93dd0ab..204ff59a7a 100755
--- a/racket/src/cfg-racket
+++ b/racket/src/cfg-racket
@@ -1499,7 +1499,7 @@ Optional Features:
   --enable-gcov           compile to gather gcov statistics (gcc3 only)
   --enable-strip          strip debug on install (usually enabled by default)
   --enable-noopt          drop -O C flags (useful for low-level debugging)
-  --enable-ubsan          compile with -fsanitize=undefined)
+  --enable-ubsan          compile with -fsanitize=undefined
   --enable-jitframe       x86_64: use frame pointer for internal calls
   --enable-crossany       Record own cross target as machine-independent
 
diff --git a/racket/src/cs/c/configure b/racket/src/cs/c/configure
index 18f6bab3ea..8dbacc4d5a 100755
--- a/racket/src/cs/c/configure
+++ b/racket/src/cs/c/configure
@@ -1426,7 +1426,7 @@ Optional Features:
   --enable-userfw         install Mac OS frameworks to ~/Library/Frameworks
   --enable-mac64          allow 64-bit Mac OS build (enabled by default)
   --enable-strip          strip debug on install (usually enabled by default)
-  --enable-ubsan          compile with -fsanitize=undefined)
+  --enable-ubsan          compile with -fsanitize=undefined
   --enable-csdefault      use CS as default build
   --enable-csonly         build CS only
   --enable-parent         Create "../Makefile" (internal use)