diff --git a/src/functions.js b/src/functions.js
index d493c946..c3fff7a4 100644
--- a/src/functions.js
+++ b/src/functions.js
@@ -293,6 +293,7 @@ const functions = (() => {
         }
 
         var result;
+        width = Math.trunc(width);
         var padLength = Math.abs(width) - length(str);
         if (padLength > 0) {
             var padding = (new Array(padLength + 1)).join(char);
diff --git a/test/test-suite/groups/function-pad/case011.json b/test/test-suite/groups/function-pad/case011.json
new file mode 100644
index 00000000..f7dbc539
--- /dev/null
+++ b/test/test-suite/groups/function-pad/case011.json
@@ -0,0 +1,6 @@
+{
+    "expr": "$pad('foo', 5.7, ' ')",
+    "dataset": null,
+    "bindings": {},
+    "result": "foo  "
+}
\ No newline at end of file
diff --git a/test/test-suite/groups/function-pad/case012.json b/test/test-suite/groups/function-pad/case012.json
new file mode 100644
index 00000000..502d0754
--- /dev/null
+++ b/test/test-suite/groups/function-pad/case012.json
@@ -0,0 +1,6 @@
+{
+    "expr": "$pad('foo', -5.7, ' ')",
+    "dataset": null,
+    "bindings": {},
+    "result": "  foo"
+}
\ No newline at end of file