diff --git a/src/nwpw/pspw/lib/exchange-correlation/vdw-DF/GNUmakefile b/src/nwpw/pspw/lib/exchange-correlation/vdw-DF/GNUmakefile
index 126d5fa1d8..35431a25b8 100644
--- a/src/nwpw/pspw/lib/exchange-correlation/vdw-DF/GNUmakefile
+++ b/src/nwpw/pspw/lib/exchange-correlation/vdw-DF/GNUmakefile
@@ -12,7 +12,7 @@
 
       LIBRARY = libpspw.a
 
-    USES_BLAS = vdw-DF.F
+    USES_BLAS = vdw-DF.F vdw_DF_kernel.F
 
 
   LIB_DEFINES =