diff --git a/validate-generate.sh b/validate-generate.sh
index 6507fbb..2dc378a 100755
--- a/validate-generate.sh
+++ b/validate-generate.sh
@@ -2,6 +2,8 @@
 
 # Generate font files with FontForge, and a CSS declaration for this font.
 
+if ! type fontforge &> /dev/null; then echo "ERROR: Missing dependency: fontforge" 1>&2; exit 1; fi
+
 basename=$1
 ttf="${basename}.ttf"
 otf="OTF/${basename}.otf"