diff --git a/smithy-model/src/main/java/software/amazon/smithy/model/loader/IdlModelLoader.java b/smithy-model/src/main/java/software/amazon/smithy/model/loader/IdlModelLoader.java
index 99793715bf0..141db61b01c 100644
--- a/smithy-model/src/main/java/software/amazon/smithy/model/loader/IdlModelLoader.java
+++ b/smithy-model/src/main/java/software/amazon/smithy/model/loader/IdlModelLoader.java
@@ -1083,7 +1083,6 @@ private void parseInlineableOperationMember(
             }
             // Remove any pending, invalid docs that may have come before the inline shape.
             tokenizer.removePendingDocCommentLines();
-            tokenizer.next();
             // don't skip docs here in case there are docs on the inlined structure.
             tokenizer.skipWs();
             consumer.accept(parseInlineStructure(id.getName() + suffix, defaultTrait));
diff --git a/smithy-model/src/test/resources/software/amazon/smithy/model/loader/valid/inline-io/inline-io.smithy b/smithy-model/src/test/resources/software/amazon/smithy/model/loader/valid/inline-io/inline-io.smithy
index 858368f5d09..42c8d2afeda 100644
--- a/smithy-model/src/test/resources/software/amazon/smithy/model/loader/valid/inline-io/inline-io.smithy
+++ b/smithy-model/src/test/resources/software/amazon/smithy/model/loader/valid/inline-io/inline-io.smithy
@@ -30,7 +30,8 @@ structure NameBearer {
 }
 
 operation UsesMixins {
-    input := with [NameBearer] {
+    // Parser handles weird/missing SP
+    input :=with [NameBearer] {
         id: String
     }