diff --git a/disas/meson.build b/disas/meson.build
index ba22f7cbcd..1977f5cd92 100644
--- a/disas/meson.build
+++ b/disas/meson.build
@@ -5,7 +5,7 @@ common_ss.add(when: 'CONFIG_HPPA_DIS', if_true: files('hppa.c'))
 common_ss.add(when: 'CONFIG_M68K_DIS', if_true: files('m68k.c'))
 common_ss.add(when: 'CONFIG_MICROBLAZE_DIS', if_true: files('microblaze.c'))
 common_ss.add(when: 'CONFIG_MIPS_DIS', if_true: files('mips.c'))
-common_ss.add(when: 'CONFIG_NANOMIPS_DIS', if_true: files('nanomips.cpp'))
+common_ss.add(when: 'CONFIG_NANOMIPS_DIS', if_true: files('nanomips.c'))
 common_ss.add(when: 'CONFIG_NIOS2_DIS', if_true: files('nios2.c'))
 common_ss.add(when: 'CONFIG_RISCV_DIS', if_true: files('riscv.c'))
 common_ss.add(when: 'CONFIG_SH4_DIS', if_true: files('sh4.c'))
diff --git a/disas/nanomips.cpp b/disas/nanomips.c
similarity index 100%
rename from disas/nanomips.cpp
rename to disas/nanomips.c