diff --git a/gnu/dist/toolchain/gdb/config/sparc/nm-nbsd64.h b/gnu/dist/toolchain/gdb/config/sparc/nm-nbsd64.h
index b49f89beeac6..b59ec0c9a1c3 100644
--- a/gnu/dist/toolchain/gdb/config/sparc/nm-nbsd64.h
+++ b/gnu/dist/toolchain/gdb/config/sparc/nm-nbsd64.h
@@ -23,6 +23,7 @@
 #define NM_NBSD_H
 
 #define SVR4_SHARED_LIBS
+#define TARGET_ELF64
 
 /* Get generic NetBSD native definitions. */