diff --git a/dlls/dbghelp/dbghelp.c b/dlls/dbghelp/dbghelp.c
index b54ebf1c547..369e098381e 100644
--- a/dlls/dbghelp/dbghelp.c
+++ b/dlls/dbghelp/dbghelp.c
@@ -292,6 +292,7 @@ static BOOL check_live_target(struct process* pcs)
         base = base32;
     }
     else ReadProcessMemory(pcs->handle, &pbi.PebBaseAddress->Reserved[0], &base, sizeof(base), NULL);
+    if (!base) return FALSE;
 
     TRACE("got debug info address %#lx from PEB %p\n", base, pbi.PebBaseAddress);
     return elf_read_wine_loader_dbg_info(pcs, base) || macho_read_wine_loader_dbg_info(pcs, base);
diff --git a/dlls/dbghelp/macho_module.c b/dlls/dbghelp/macho_module.c
index 8aa232e1ed2..413a25c663d 100644
--- a/dlls/dbghelp/macho_module.c
+++ b/dlls/dbghelp/macho_module.c
@@ -1845,8 +1845,7 @@ static BOOL macho_search_loader(struct process* pcs, struct macho_info* macho_in
         len = sizeof(image_infos.infos64);
     else
         len = sizeof(image_infos.infos32);
-    if (pcs->dbg_hdr_addr &&
-        ReadProcessMemory(pcs->handle, (void*)pcs->dbg_hdr_addr, &image_infos, len, NULL))
+    if (ReadProcessMemory(pcs->handle, (void*)pcs->dbg_hdr_addr, &image_infos, len, NULL))
     {
         if (pcs->is_64bit)
             len = sizeof(image_info.info64);