diff --git a/bin/imgresize.sh b/bin/imgresize.sh
index f1007dd..98d47a6 100644
--- a/bin/imgresize.sh
+++ b/bin/imgresize.sh
@@ -40,8 +40,8 @@ if [ -z "$3" ]; then
 fi
 
 size=$1
-w=${size#x*}
-h=${size%*x}
+w=${size%x*}
+h=${size#*x}
 infile=$2
 outfile=$3