diff --git a/memory-constraints.macros b/memory-constraints.macros
index 1ffe94e..1320f6d 100644
--- a/memory-constraints.macros
+++ b/memory-constraints.macros
@@ -7,8 +7,8 @@
 
 # m: memory limit in Bs per core; default is 1000000
 %limit_build(m:) \
-    _threads="`/usr/bin/getconf _NPROCESSORS_ONLN`"
-    _core_memory="%{-m:%{-m*}}%{!-m:1000000}"
+    _threads="`/usr/bin/getconf _NPROCESSORS_ONLN`" \
+    _core_memory="%{-m:%{-m*}}%{!-m:1000000}" \
     echo "Available memory:" \
     cat /proc/meminfo \
     echo "System limits:" \