diff --git a/Makefile b/Makefile
index b19fb2d64e..c9d67fe98e 100644
--- a/Makefile
+++ b/Makefile
@@ -34,8 +34,12 @@ ifndef gitexecdir
 endif
 
 ifndef sharedir
+ifeq (git-core,$(notdir $(gitexecdir)))
+	sharedir := $(dir $(patsubst %/,%,$(dir $(gitexecdir))))share
+else
 	sharedir := $(dir $(gitexecdir))share
 endif
+endif
 
 ifndef INSTALL
 	INSTALL = install