diff --git a/Makefile.am b/Makefile.am
index 73073459..d48ff419 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -12,7 +12,7 @@ SUBDIRS		= lib submodules ccan sph
 
 bin_PROGRAMS     = sgminer
 
-sgminer_CPPFLAGS = $(PTHREAD_FLAGS) -fno-strict-aliasing $(JANSSON_CPPFLAGS)
+sgminer_CPPFLAGS = $(PTHREAD_FLAGS) -std=gnu99 $(JANSSON_CPPFLAGS)
 sgminer_LDFLAGS  = $(PTHREAD_FLAGS)
 sgminer_LDADD    = $(DLOPEN_FLAGS) @LIBCURL_LIBS@ @JANSSON_LIBS@ @PTHREAD_LIBS@ \
 		  @OPENCL_LIBS@ @NCURSES_LIBS@ @PDCURSES_LIBS@ @WS2_LIBS@ \