diff --git a/Makefile.in b/Makefile.in
index d00b565..c465d0b 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -294,7 +294,7 @@ libhogweed.a: $(hogweed_OBJS)
 
 %.$(OBJEXT): %.asm $(srcdir)/m4-utils.m4 $(srcdir)/asm.m4 config.m4 machine.m4
 	$(M4) $(srcdir)/m4-utils.m4 $(srcdir)/asm.m4 config.m4 machine.m4 $< >$*.s
-	$(COMPILE) -c $*.s
+	$(COMPILE_AS) -c $*.s
 
 %.$(OBJEXT): %.c
 	$(COMPILE) -c $< \
diff --git a/config.make.in b/config.make.in
index f8e1f74..4668884 100644
--- a/config.make.in
+++ b/config.make.in
@@ -73,6 +73,8 @@ TEST_SHLIB_DIR = ${abs_top_builddir}/.lib
 # flags before CPPFLAGS and LDFLAGS. While EXTRA_CFLAGS are added at the end.
 
 COMPILE = $(CC) $(PRE_CPPFLAGS) $(CPPFLAGS) $(DEFS) $(CFLAGS) $(EXTRA_CFLAGS) $(DEP_FLAGS)
+CCAS = @CCAS@
+COMPILE_AS = $(CCAS) $(PRE_CPPFLAGS) $(CPPFLAGS) $(DEFS) $(ASMFLAGS) $(DEP_FLAGS)
 COMPILE_CXX = $(CXX) $(PRE_CPPFLAGS) $(CPPFLAGS) $(DEFS) $(CXXFLAGS) $(DEP_FLAGS)
 LINK = $(CC) $(CFLAGS) $(PRE_LDFLAGS) $(LDFLAGS)
 LINK_CXX = $(CXX) $(CXXFLAGS) $(PRE_LDFLAGS) $(LDFLAGS)
diff --git a/configure.ac b/configure.ac
index 1012718..8db139d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -118,6 +118,9 @@ LSH_RPATH_INIT([`echo $with_lib_path | sed 's/:/ /g'` \
 
 # Checks for programs.
 AC_PROG_CC
+# Copied from gmp
+test -n "$CCAS" || CCAS='$(CC)'
+AC_SUBST(CCAS)
 
 NETTLE_CHECK_IFUNC