diff --git a/examples/community/llm_grounded_diffusion.py b/examples/community/llm_grounded_diffusion.py
index 5db144a9a2..c3b07ade7b 100644
--- a/examples/community/llm_grounded_diffusion.py
+++ b/examples/community/llm_grounded_diffusion.py
@@ -530,7 +530,7 @@ class LLMGroundedDiffusionPipeline(
                 )
 
         if len(phrases) != len(boxes):
-            ValueError(
+            raise ValueError(
                 "length of `phrases` and `boxes` has to be same, but"
                 f" got: `phrases` {len(phrases)} != `boxes` {len(boxes)}"
             )
diff --git a/src/diffusers/pipelines/stable_diffusion_gligen/pipeline_stable_diffusion_gligen.py b/src/diffusers/pipelines/stable_diffusion_gligen/pipeline_stable_diffusion_gligen.py
index e0b40487ac..6273128be2 100644
--- a/src/diffusers/pipelines/stable_diffusion_gligen/pipeline_stable_diffusion_gligen.py
+++ b/src/diffusers/pipelines/stable_diffusion_gligen/pipeline_stable_diffusion_gligen.py
@@ -469,7 +469,7 @@ class StableDiffusionGLIGENPipeline(DiffusionPipeline, StableDiffusionMixin):
                 )
 
         if len(gligen_phrases) != len(gligen_boxes):
-            ValueError(
+            raise ValueError(
                 "length of `gligen_phrases` and `gligen_boxes` has to be same, but"
                 f" got: `gligen_phrases` {len(gligen_phrases)} != `gligen_boxes` {len(gligen_boxes)}"
             )