diff --git a/m4/grapeiface.m4 b/m4/grapeiface.m4
index dd92be0e057d268c49990b28680dc8e21f5ca9bd..e677202691e292b29571d3c7e048432d174b7488 100644
--- a/m4/grapeiface.m4
+++ b/m4/grapeiface.m4
@@ -20,7 +20,7 @@ ALBERTA_DEBUG_LIBS_1='$(top_builddir)/alberta/src/alberta_1d_debug/libalberta_1d
 
 ALBERTA_DEBUG_LIBS_2='$(top_builddir)/alberta/src/alberta_2d_debug/libalberta_2d_debug.la $(top_builddir)/alberta_util/src/libalberta_util_debug.la $(BLAS_ALL_LIBS)'
 
-ALBERTA_DEBUG_LIBS_3='$(top_builddir)/alberta/src/alberta_3d/libalberta_3d_debug.la $(top_builddir)/alberta_util/src/libalberta_util_debug.la $(BLAS_ALL_LIBS)'
+ALBERTA_DEBUG_LIBS_3='$(top_builddir)/alberta/src/alberta_3d_debug/libalberta_3d_debug.la $(top_builddir)/alberta_util/src/libalberta_util_debug.la $(BLAS_ALL_LIBS)'
 
 AC_SUBST(ALBERTA_DEBUG)
 AC_SUBST(ALBERTA_LIB_PATHS)