diff --git a/plugins/Makefile b/plugins/Makefile
index f2604f1..6d5ce49 100644
--- a/plugins/Makefile
+++ b/plugins/Makefile
@@ -1040,6 +1040,7 @@ SURGEXT_FLAGS += \
 	-Isurgext/surge/libs/tuning-library/include \
 	-I../deps/surge-build/libs/sst/sst-plugininfra/libs/filesystem/include \
 	-include limits \
+	-include cstdint \
 	-DSURGE_COMPILE_BLOCK_SIZE=8 \
 	-DSURGE_SKIP_ODDSOUND_MTS \
 	-DHAS_LUA=0 \