diff --git a/linker/linker.h b/linker/linker.h
index 8a5bc45..7b1ba51 100644
--- a/linker/linker.h
+++ b/linker/linker.h
@@ -213,8 +213,8 @@
 unsigned unload_library(soinfo *si);
 Elf32_Sym *lookup_in_library(soinfo *si, const char *name);
 Elf32_Sym *lookup(const char *name, soinfo **found, soinfo *start);
-soinfo *find_containing_library(void *addr);
-Elf32_Sym *find_containing_symbol(void *addr, soinfo *si);
+soinfo *find_containing_library(const void *addr);
+Elf32_Sym *find_containing_symbol(const void *addr, soinfo *si);
 const char *linker_get_error(void);
 
 #ifdef ANDROID_ARM_LINKER