diff --git a/mobile/gen_bindings.sh b/mobile/gen_bindings.sh
index 705646b26..14cb76651 100755
--- a/mobile/gen_bindings.sh
+++ b/mobile/gen_bindings.sh
@@ -45,7 +45,7 @@ protoc -I/usr/local/include -I. \
 # If prefix=1 is specified, prefix the generated methods with subserver name.
 # This must be enabled to support subservers with name conflicts.
 use_prefix="0"
-if [[ $prefix = "1" ]]
+if [ "$prefix" = "1" ]
 then
     echo "Prefixing methods with subserver name"
     use_prefix="1"