diff --git a/src/hardware/mame/Makefile.am b/src/hardware/mame/Makefile.am
index 52f7f000..3d551b1f 100644
--- a/src/hardware/mame/Makefile.am
+++ b/src/hardware/mame/Makefile.am
@@ -4,6 +4,6 @@ noinst_LIBRARIES = libmame.a
 libmame_a_SOURCES = emu.h \
     fmopl.cpp fmopl.h \
     saa1099.cpp saa1099.h \
-    sn76496.cpp sn76496.cpp \
+    sn76496.cpp sn76496.h \
     ymdeltat.cpp ymdeltat.h \
     ymf262.cpp ymf262.h