diff --git a/build/update-setup-h b/build/update-setup-h
index 7154bb4c68..5f8b05c3dd 100755
--- a/build/update-setup-h
+++ b/build/update-setup-h
@@ -43,7 +43,7 @@ cat_common_options_for()
         # The setup.h.in template for cmake needs special processing
         cmd="$cmd | sed -e '/^\/\//d' \
                         -e 's@ *//.*\$@@' \
-                        -e 's/# *define \(.\+\) \+\(1\|0\) *\$/#cmakedefine01 \1/'"
+                        -e 's/# *define \([^ ]\+\) \+\(1\|0\) *\$/#cmakedefine01 \1/'"
     fi
 
     eval $cmd