diff --git a/configure.ac b/configure.ac
index 66ddc35b..0c86a891 100644
--- a/configure.ac
+++ b/configure.ac
@@ -152,7 +152,7 @@ AC_CHECK_HEADERS([emmintrin.h], [], [], [
 ])
 
 AC_CHECK_HEADERS([tmmintrin.h], [], [], [
-#pragma GCC target("sse3")
+#pragma GCC target("ssse3")
 ])
 
 AC_CHECK_HEADERS([smmintrin.h], [], [], [
@@ -163,6 +163,10 @@ AC_CHECK_HEADERS([immintrin.h], [], [], [
 #pragma GCC target("avx")
 ])
 
+AC_CHECK_HEADERS([avxintrin.h], [], [], [
+#pragma GCC target("avx")
+])
+
 AC_CHECK_HEADERS([x86intrin.h], [], [], [
 #pragma GCC target("xop")
 ])