diff --git a/src/tce/ducc/GNUmakefile b/src/tce/ducc/GNUmakefile
index 2ee55a2972..948d3bb0cd 100644
--- a/src/tce/ducc/GNUmakefile
+++ b/src/tce/ducc/GNUmakefile
@@ -5,7 +5,7 @@ LIB_INCLUDES = -I../include
 
 LIBRARY = libtce.a
 
-USES_BLAS = rot_vir.F
+USES_BLAS = rot_vir.F map_hcore.F
 
 LIB_DEFINES = -DDEBUG_PRINT