diff --git a/Makefile b/Makefile
index 8d86c7e4..d9887457 100644
--- a/Makefile
+++ b/Makefile
@@ -24,7 +24,7 @@
 # Uncomment the third line on SMP systems if the magic invocation fails. It
 # is a bit complicated because SMP configuration changed around kernel 2.1.130
 SMP := $(shell if grep -q '^SMP[[:space:]]*=' /usr/src/linux/Makefile || \
-                  grep -q '^[[:space:]]*\#define[[::space:]]*CONFIG_SMP[[:space:]]*1' /usr/include/linux/autoconf.h ; \
+                  grep -q '^[[:space:]]*\#define[[:space:]]*CONFIG_SMP[[:space:]]*1' /usr/include/linux/autoconf.h ; \
                then echo 1; else echo 0; fi)
 #SMP := 0
 #SMP := 1