diff --git a/modules/__tests__/createPrefixer-test.js b/modules/__tests__/createPrefixer-test.js
index 37bac0f..2efdad0 100644
--- a/modules/__tests__/createPrefixer-test.js
+++ b/modules/__tests__/createPrefixer-test.js
@@ -555,6 +555,21 @@ describe('Static Prefixer', () => {
           }
           expect(prefix(input)).toEqual(output)
         })
+
+        it('should expand the shorthand gridRow without a slash', () => {
+          const input = { gridRow: 'span 3' }
+          const output = {
+            gridRow: 'span 3',
+          }
+          expect(prefix(input)).toEqual(output)
+        })
+        it('should expand the shorthand gridColumn without a slash', () => {
+          const input = { gridColumn: 'span 3' }
+          const output = {
+            gridColumn: 'span 3',
+          }
+          expect(prefix(input)).toEqual(output)
+        })
       })
     })
   })
diff --git a/modules/plugins/grid.js b/modules/plugins/grid.js
index 7f34df3..1d5bb51 100644
--- a/modules/plugins/grid.js
+++ b/modules/plugins/grid.js
@@ -4,6 +4,10 @@ function isSimplePositionValue(value: any) {
   return typeof value === 'number' && !isNaN(value)
 }
 
+function isComplexSpanValue(value: string) {
+  return typeof value === 'string' && value.includes('/')
+}
+
 const alignmentValues = ['center', 'end', 'start', 'stretch']
 
 const displayValues = {
@@ -21,7 +25,7 @@ const propertyConverters = {
   gridColumn: (value: any, style: Object) => {
     if (isSimplePositionValue(value)) {
       style.msGridColumn = value
-    } else {
+    } else if (isComplexSpanValue(value)) {
       const [start, end] = value.split('/')
       propertyConverters.gridColumnStart(+start, style)
 
@@ -31,6 +35,8 @@ const propertyConverters = {
       } else {
         propertyConverters.gridColumnEnd(+end, style)
       }
+    } else {
+      propertyConverters.gridColumnStart(value, style)
     }
   },
 
@@ -50,7 +56,7 @@ const propertyConverters = {
   gridRow: (value: any, style: Object) => {
     if (isSimplePositionValue(value)) {
       style.msGridRow = value
-    } else {
+    } else if (isComplexSpanValue(value)) {
       const [start, end] = value.split('/')
       propertyConverters.gridRowStart(+start, style)
 
@@ -60,6 +66,8 @@ const propertyConverters = {
       } else {
         propertyConverters.gridRowEnd(+end, style)
       }
+    } else {
+      propertyConverters.gridRowStart(value, style)
     }
   },
 
diff --git a/package.json b/package.json
index 01eba1e..2af296b 100644
--- a/package.json
+++ b/package.json
@@ -76,4 +76,4 @@
     "prettier": "^1.14.2",
     "rimraf": "^2.6.2"
   }
-}
\ No newline at end of file
+}