diff --git a/Makefile.common b/Makefile.common
index cce3ef1d16..f8d0172026 100644
--- a/Makefile.common
+++ b/Makefile.common
@@ -91,7 +91,7 @@ $(error DOCKERFILE_PATH is deprecated. Use DOCKERFILE_VARIANTS ?= $(DOCKERFILE_P
 endif
 
 DOCKER_ARCHS            ?= amd64
-DOCKERFILE_VARIANTS     ?= Dockerfile $(wildcard Dockerfile.*)
+DOCKERFILE_VARIANTS     ?= $(wildcard Dockerfile Dockerfile.*)
 
 # Function to extract variant from Dockerfile label.
 # Returns the variant name from io.prometheus.image.variant label, or "default" if not found.