diff --git a/Makefile.unix b/Makefile.unix
index 88637c1a14f8ffa90c18911cf9748978dc61688f..bd980c608d7298f54f7ebd99f69e86794110ae4c 100644
--- a/Makefile.unix
+++ b/Makefile.unix
@@ -30,6 +30,7 @@ ifdef FIXED_POINT
 SILK_SOURCES += $(SILK_SOURCES_FIXED)
 else
 SILK_SOURCES += $(SILK_SOURCES_FLOAT)
+OPUS_SOURCES += $(OPUS_SOURCES_FLOAT)
 endif
 
 EXESUFFIX =