diff --git a/cachegrind/tests/x86/Makefile.am b/cachegrind/tests/x86/Makefile.am
index bc98f6a5e..3e693bd1a 100644
--- a/cachegrind/tests/x86/Makefile.am
+++ b/cachegrind/tests/x86/Makefile.am
@@ -6,6 +6,7 @@ EXTRA_DIST = $(noinst_SCRIPTS) \
 check_PROGRAMS = \
 	fpu-28-108
 
-AM_CFLAGS   = $(WERROR) @FLAG_M32@ -Winline -Wall -Wshadow -g
+AM_CFLAGS    = $(WERROR) @FLAG_M32@ -Winline -Wall -Wshadow -g
+AM_CCASFLAGS = @FLAG_M32@
 
 fpu_28_108_SOURCES	= fpu-28-108.S