diff --git a/autogen.sh b/autogen.sh
index 559e3dd43..fb278559c 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -273,7 +273,7 @@ touch ${srcdir}/aegisub/posix/config.h
 
 echo "--- Converting BMP resource files -> XPM ---"
 # BMP -> XPM via src/res.rc
-cat ${srcdir}/aegisub/res.rc | ${BIN_AWK} -f ${srcdir}/scripts/genxpm.awk > ${srcdir}/aegisub/bitmaps/Makefile.bitmaps
+cat ${srcdir}/aegisub/res.rc | ${BIN_AWK} -f ${srcdir}/scripts/genxpm.awk BIN_CONVERT="$BIN_CONVERT" > ${srcdir}/aegisub/bitmaps/Makefile.bitmaps
 cd ${srcdir}/aegisub/bitmaps
 make -f Makefile.bitmaps
 cd ${srcdir}
diff --git a/scripts/genxpm.awk b/scripts/genxpm.awk
index 12ff21df2..21356235d 100644
--- a/scripts/genxpm.awk
+++ b/scripts/genxpm.awk
@@ -8,8 +8,8 @@ END {
   printf(" \
 all: bmp2xpm wxicon_xpm.xpm \n \
 .PHONY: all bmp2xpm \n \
-CONVERT ?= convert \n \
-")
+CONVERT ?= %s \n \
+", BIN_CONVERT)
 
   printf("wxicon_xpm.xpm: icon.ico\n	$(CONVERT) 'icon.ico[2]' wxicon_xpm.xpm\n");