diff --git a/doc/Makefile b/doc/Makefile
index 399451bb..953c8076 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -7,6 +7,7 @@
 TARGETS ?= stm32/f0 stm32/f1 stm32/f2 stm32/f3 stm32/f4 stm32/f7 stm32/h7 \
 		   stm32/l0 stm32/l1 stm32/l4 \
 		   stm32/g0 stm32/g4 \
+		   stm32/u5 \
 		   gd32/f1x0 \
 		   efm32/g efm32/gg efm32/hg efm32/lg efm32/tg \
 		   efm32/wg efm32/ezr32wg \
diff --git a/doc/stm32u5/doxy.custom b/doc/stm32u5/doxy.custom
new file mode 100644
index 00000000..05c39db5
--- /dev/null
+++ b/doc/stm32u5/doxy.custom
@@ -0,0 +1 @@
+PREDEFINED += __ARM_ARCH_8EM__