diff --git a/src/aclocal.m4 b/src/aclocal.m4
index 9062dab6f..6f52c6696 100644
--- a/src/aclocal.m4
+++ b/src/aclocal.m4
@@ -237,7 +237,7 @@ AC_SUBST(EXEEXT)
 AC_SUBST(INSTALL_TARGET)dnl Which type of installation: flat directory or unix like.
 AC_SUBST(thehost)
 AC_SUBST(ECL_GC_DIR)dnl Which version of the Boehm-Weiser library to use
-ECL_GC_DIR=gc
+ECL_GC_DIR=gc-unstable
 ECL_LDRPATH=''
 SHAREDEXT='so'
 SHAREDPREFIX='lib'
diff --git a/src/configure b/src/configure
index ab64763aa..ee7ee3b58 100755
--- a/src/configure
+++ b/src/configure
@@ -4833,7 +4833,7 @@ MV="mv"
 
 
 
-ECL_GC_DIR=gc
+ECL_GC_DIR=gc-unstable
 ECL_LDRPATH=''
 SHAREDEXT='so'
 SHAREDPREFIX='lib'