diff --git a/libs/silk/Makefile.am b/libs/silk/Makefile.am
index 8b26c971b8..071f1ecd64 100644
--- a/libs/silk/Makefile.am
+++ b/libs/silk/Makefile.am
@@ -1,4 +1,4 @@
-AM_CFLAGS = -Isrc -Iinterface -fPIC -all -O3
+AM_CFLAGS = -Isrc -Iinterface -fPIC -O3
 AUTOMAKE_OPTS = gnu
 NAME = libSKP_SILK_SDK
 AM_CPPFLAGS = $(AM_CFLAGS)