diff --git a/MCONFIG b/MCONFIG
index 7a24b82..1141b78 100644
--- a/MCONFIG
+++ b/MCONFIG
@@ -29,6 +29,10 @@
 KRNLSRC = $(SRCROOT)/linux
 KRNLOBJ = $(SRCROOT)/linux
 
+# klibc version information
+KLIBCVER = -D__KLIBC__=$(shell cut -d. -f1 < $(SRCROOT)/version) \
+	   -D__KLIBC_MINOR__=$(shell cut -d. -f2 < $(SRCROOT)/version)
+
 ARCH    = $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ -e s/arm.*/arm/ -e s/sa110/arm/)
 CC	= $(CROSS)gcc
 LD      = $(CROSS)ld
@@ -38,7 +42,7 @@
 	  -I$(SRCROOT)/include/bits$(BITSIZE) \
 	  -I$(SRCROOT)/include \
 	  -I$(KRNLOBJ)/include -I$(KRNLOBJ)/include2 -I$(KRNLSRC)/include
-REQFLAGS = $(ARCHREQFLAGS) -nostdinc -iwithprefix include -D__KLIBC__ \
+REQFLAGS = $(ARCHREQFLAGS) $(KLIBCVER) -nostdinc -iwithprefix include \
 	   $(INCLUDE)
 LDFLAGS =
 AR      = $(CROSS)ar