diff --git a/src/soc/amd/picasso/chip.c b/src/soc/amd/picasso/chip.c
index 8722d57b7d..e0510a26de 100644
--- a/src/soc/amd/picasso/chip.c
+++ b/src/soc/amd/picasso/chip.c
@@ -25,7 +25,7 @@ struct device_operations cpu_bus_ops = {
 	.acpi_fill_ssdt   = generate_cpu_entries,
 };
 
-const char *soc_acpi_name(const struct device *dev)
+static const char *soc_acpi_name(const struct device *dev)
 {
 	if (dev->path.type == DEVICE_PATH_DOMAIN)
 		return "PCI0";
diff --git a/src/soc/amd/picasso/include/soc/acpi.h b/src/soc/amd/picasso/include/soc/acpi.h
index 254e5d909e..804b27cd0c 100644
--- a/src/soc/amd/picasso/include/soc/acpi.h
+++ b/src/soc/amd/picasso/include/soc/acpi.h
@@ -11,6 +11,4 @@
 uintptr_t agesa_write_acpi_tables(const struct device *device, uintptr_t current,
 				  acpi_rsdp_t *rsdp);
 
-const char *soc_acpi_name(const struct device *dev);
-
 #endif /* AMD_PICASSO_ACPI_H */