diff --git a/xen/arch/arm/bootfdt.c b/xen/arch/arm/bootfdt.c
index b6f92a174f..2673ad17a1 100644
--- a/xen/arch/arm/bootfdt.c
+++ b/xen/arch/arm/bootfdt.c
@@ -225,7 +225,7 @@ static int __init process_reserved_memory_node(const void *fdt, int node,
                                  size_cells, data);
 
     if ( rc == -ENOSPC )
-        panic("Max number of supported reserved-memory regions reached.");
+        panic("Max number of supported reserved-memory regions reached.\n");
     else if ( rc != -ENOENT )
         return rc;
     return 0;
diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 579bc8194f..d0d6be922d 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -74,7 +74,7 @@ int __init parse_arch_dom0_param(const char *s, const char *e)
 
         return 0;
 #else
-        panic("'sve' property found, but CONFIG_ARM64_SVE not selected");
+        panic("'sve' property found, but CONFIG_ARM64_SVE not selected\n");
 #endif
     }
 
@@ -697,7 +697,7 @@ static void __init allocate_static_memory(struct domain *d,
     return;
 
  fail:
-    panic("Failed to allocate requested static memory for domain %pd.", d);
+    panic("Failed to allocate requested static memory for domain %pd.\n", d);
 }
 
 /*
@@ -769,7 +769,7 @@ static void __init assign_static_memory_11(struct domain *d,
     return;
 
  fail:
-    panic("Failed to assign requested static memory for direct-map domain %pd.",
+    panic("Failed to assign requested static memory for direct-map domain %pd.\n",
           d);
 }
 
diff --git a/xen/arch/x86/cpu/microcode/core.c b/xen/arch/x86/cpu/microcode/core.c
index e65af4b82e..c3fee62906 100644
--- a/xen/arch/x86/cpu/microcode/core.c
+++ b/xen/arch/x86/cpu/microcode/core.c
@@ -524,7 +524,7 @@ static int control_thread_fn(const struct microcode_patch *patch)
          */
         if ( wait_for_condition(wait_cpu_callout, (done + 1),
                                 MICROCODE_UPDATE_TIMEOUT_US) )
-            panic("Timeout when finished updating microcode (finished %u/%u)",
+            panic("Timeout when finished updating microcode (finished %u/%u)\n",
                   done, nr_cores);
 
         /* Print warning message once if long time is spent here */