diff --git a/mk/rt.mk b/mk/rt.mk
index 67ca5fefffc3e..c506e8f78cb7d 100644
--- a/mk/rt.mk
+++ b/mk/rt.mk
@@ -261,7 +261,7 @@ $$(JEMALLOC_LIB_$(1)): $$(JEMALLOC_DEPS) $$(MKFILE_DEPS)
 		AR="$$(AR_$(1))" \
 		RANLIB="$$(AR_$(1)) s" \
 		CPPFLAGS="-I $(S)src/rt/" \
-		EXTRA_CFLAGS="$$(CFG_CFLAGS_$(1))"
+		EXTRA_CFLAGS="$$(CFG_CFLAGS_$(1)) -g1"
 	$$(Q)$$(MAKE) -C "$$(JEMALLOC_BUILD_DIR_$(1))" build_lib_static
 	$$(Q)cp $$(JEMALLOC_BUILD_DIR_$(1))/lib/$$(JEMALLOC_REAL_NAME_$(1)) $$(JEMALLOC_LIB_$(1))