diff --git a/mingw-Makefile.inc b/mingw-Makefile.inc
index 79d8966e..0710fe15 100644
--- a/mingw-Makefile.inc
+++ b/mingw-Makefile.inc
@@ -4,6 +4,9 @@ MINGW_EXEC_PREFIX ?=
 # where the dependencies package is extracted
 RADIANT_DEPENDENCIES_PREFIX = $(HOME)/radiant-deps-mingw32/
 
+# run the prefix fixing tool
+IGNORETHIS := $(shell cd $(RADIANT_DEPENDENCIES_PREFIX) && ./fixprefix.sh)
+
 # set the environment for make
 OS = Win32
 CFLAGS +=