svx, sd: Boost.JSON needs no library to link

diff --git a/svx/Library_svxcore.mk b/svx/Library_svxcore.mk
index 08daa4dd7..e20b9c529 100644
--- a/svx/Library_svxcore.mk
+++ b/svx/Library_svxcore.mk
@@ -51,6 +51,7 @@ $(eval $(call gb_Library_set_precompiled_header,svxcore,svx/inc/pch/precompiled_
 
 $(eval $(call gb_Library_add_defs,svxcore,\
     -DSVXCORE_DLLIMPLEMENTATION \
+    -DBOOST_ALL_NO_LIB \
 ))
 
 $(eval $(call gb_Library_use_libraries,svxcore,\
diff --git a/sd/Library_sd.mk b/sd/Library_sd.mk
index f29e8f280..7d04eb6be 100644
--- a/sd/Library_sd.mk
+++ b/sd/Library_sd.mk
@@ -49,6 +49,7 @@ $(eval $(call gb_Library_set_include,sd,\
 
 $(eval $(call gb_Library_add_defs,sd,\
 	-DSD_DLLIMPLEMENTATION \
+	-DBOOST_ALL_NO_LIB \
 	-DSDUI_DLL_NAME=\"$(call gb_Library_get_runtime_filename,$(call gb_Library__get_name,sdui))\" \
 ))