diff --git a/zdump/dfi_vmcoreinfo.c b/zdump/dfi_vmcoreinfo.c
index f76bd731..b62c995c 100644
--- a/zdump/dfi_vmcoreinfo.c
+++ b/zdump/dfi_vmcoreinfo.c
@@ -132,7 +132,7 @@ void dfi_vmcoreinfo_init(void)
 /*
  * Return vmcoreinfo data
  */
-char *dfi_vmcoreinfo_get(void)
+const char *dfi_vmcoreinfo_get(void)
 {
 	return l.vmcoreinfo;
 }
diff --git a/zdump/dfi_vmcoreinfo.h b/zdump/dfi_vmcoreinfo.h
index 6b29f526..3cffcd13 100644
--- a/zdump/dfi_vmcoreinfo.h
+++ b/zdump/dfi_vmcoreinfo.h
@@ -9,7 +9,7 @@
 #define DFI_VMCOREINFO_H
 
 void dfi_vmcoreinfo_init(void);
-char *dfi_vmcoreinfo_get(void);
+const char *dfi_vmcoreinfo_get(void);
 int dfi_vmcoreinfo_tag(char *str, int len, const char *sym);
 int dfi_vmcoreinfo_symbol(unsigned long *val, const char *sym);
 int dfi_vmcoreinfo_offset(unsigned long *offs, const char *sym);