diff --git a/pkg/cmsis-dsp/Makefile b/pkg/cmsis-dsp/Makefile
index 14920ead50..4c3d3d7f04 100644
--- a/pkg/cmsis-dsp/Makefile
+++ b/pkg/cmsis-dsp/Makefile
@@ -1,6 +1,6 @@
 PKG_NAME=cmsis-dsp
 PKG_URL=https://github.com/gebart/CMSIS-DSP.git
-PKG_VERSION=v1.4.5-riot1
+PKG_VERSION=v1.4.5a-riot1
 PKG_DIR=$(CURDIR)/$(PKG_NAME)
 
 ifneq ($(RIOTBASE),)