diff --git a/gcc/config/i386/mmx.md b/gcc/config/i386/mmx.md
index 63aff287795eca85bf7c99ecbc3ea42c6adee5c3..c3afc6b5846cfbd5f1d2b59c7948d346e33c0adb 100644
--- a/gcc/config/i386/mmx.md
+++ b/gcc/config/i386/mmx.md
@@ -1709,7 +1709,8 @@
 	  [(match_operand:V2SF 1 "register_operand")
 	   (match_dup 2)]
 	  UNSPEC_ROUND))]
-  "TARGET_SSE4_1 && !flag_trapping_math"
+  "TARGET_SSE4_1 && !flag_trapping_math
+  && TARGET_MMX_WITH_SSE"
   "operands[2] = GEN_INT (ROUND_TRUNC | ROUND_NO_EXC);")
 
 (define_insn "*mmx_roundv2sf2"
diff --git a/gcc/testsuite/gcc.target/i386/pr107970.c b/gcc/testsuite/gcc.target/i386/pr107970.c
new file mode 100644
index 0000000000000000000000000000000000000000..1fbbb14ee724f4de26971d22b0b4eb1d4c379b75
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr107970.c
@@ -0,0 +1,10 @@
+/* { dg-do compile { target ia32 } } */
+/* { dg-options "-Ofast -m3dnow -msse4.1" } */
+
+float *foo_p;
+
+void
+foo(float *__restrict q) {
+  foo_p[0] = __builtin_truncf(q[0]);
+  foo_p[1] = __builtin_truncf(q[1]);
+}