diff --git a/Makefile.inc1 b/Makefile.inc1
index 3fffcb1734de..b5efb049d275 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -949,7 +949,18 @@ _sanity_check: .PHONY .MAKE
 # replacing generated files.  Handle these cases here in an ad-hoc fashion.
 _cleanobj_fast_depend_hack: .PHONY
 # Syscall stubs rewritten in C and obsolete MD assembly implementations
-# Date      SVN Rev  Syscalls
+# Date      SVN Rev  Syscalls/Changes
+# 20191009  r353340  removal of opensolaris_atomic.S (also r353381)
+.if ${MACHINE} != i386
+.for f in opensolaris_atomic
+	@if [ -e "${OBJTOP}/cddl/lib/libzpool/.depend.${f}.o" ] && \
+	    egrep -qw 'opensolaris_atomic\.S' ${OBJTOP}/cddl/lib/libzpool/.depend.${f}.o; then \
+		echo "Removing stale dependencies for opensolaris_atomic"; \
+		rm -f ${OBJTOP}/cddl/lib/libzpool/.depend.${f}.* \
+		   ${LIBCOMPAT:D${LIBCOMPAT_OBJTOP}/cddl/lib/libzpool/.depend.${f}.*}; \
+	fi
+.endfor
+.endif
 # 20190925  r352689  removal of obsolete i386 memchr.S
 .for f in memchr
 	@if [ -e "${OBJTOP}/lib/libc/.depend.${f}.o" ] && \