diff --git a/make/rules-cargo.mk b/make/rules-cargo.mk
index c5c66633..2dbfe75f 100644
--- a/make/rules-cargo.mk
+++ b/make/rules-cargo.mk
@@ -14,9 +14,12 @@ $$(OBJ)/.$(1)-configure$(3):
 $$(OBJ)/.$(1)-build$(3):
 	@echo ":: building $(3)bit $(1)..." >&2
 	cd $$($(2)_SRC) && env $$($(2)_ENV$(3)) \
-	cargo build $$(filter -j%,$$(MAKEFLAGS)) --target "$$(ARCH$(3))-unknown-linux-gnu" --target-dir $$($(2)_OBJ$(3)) $$(CARGO_BUILD_ARG)
+	cargo build $$(filter -j%,$$(MAKEFLAGS)) --target "$$(CARGO_TARGET_$(3))" --target-dir $$($(2)_OBJ$(3)) $$(CARGO_BUILD_ARG)
 	touch $$@
 endif
 endef
 
 rules-cargo = $(call create-rules-cargo,$(1),$(call toupper,$(1)),$(2))
+
+CARGO_TARGET_32 := i686-unknown-linux-gnu
+CARGO_TARGET_64 := x86_64-unknown-linux-gnu
diff --git a/make/rules-common.mk b/make/rules-common.mk
index 083655b7..887f3fca 100644
--- a/make/rules-common.mk
+++ b/make/rules-common.mk
@@ -109,7 +109,7 @@ CONTAINERGOALS := $(CONTAINERGOALS) $(filter $(1),$(MAKECMDGOALS))
 
 $(2)_ENV$(3) = \
     CARGO_HOME=$$(OBJ)/.cargo \
-    CARGO_TARGET_$$(call toupper,$$(ARCH$(3))-unknown-linux-gnu)_LINKER="$$(ARCH$(3))-linux-gnu-gcc" \
+    CARGO_TARGET_$$(call toupper,$$(CARGO_TARGET_$(3)))_LINKER="$$(ARCH$(3))-linux-gnu-gcc" \
     CCACHE_BASEDIR="$$(CCACHE_BASEDIR)" \
     STRIP="$$(STRIP)" \
     CC="$$(CCACHE_BIN) $$(ARCH$(3))-linux-gnu-gcc" \