diff --git a/src/modules/rlm_sql/all.mk b/src/modules/rlm_sql/all.mk
index 053fbb54433b..ee2d0d4f3b8b 100644
--- a/src/modules/rlm_sql/all.mk
+++ b/src/modules/rlm_sql/all.mk
@@ -2,4 +2,4 @@ TARGET		= rlm_sql.a
 SOURCES		= rlm_sql.c sql.c
 # this uses the RLM_CFLAGS and RLM_LIBS and SOURCES defs to make TARGET.
 
-SUBMAKEFILES := drivers/rlm_sql_null/all.mk
+SUBMAKEFILES := $(wildcard ${top_srcdir}/src/modules/rlm_sql/drivers/rlm_sql_*/all.mk)