diff -ru mingw-w64-v4.0.2/mingw-w64-crt/math/modfl.c mingw-w64-v4.0.2-patched/mingw-w64-crt/math/modfl.c
--- mingw-w64-v4.0.2/mingw-w64-crt/math/modfl.c	2015-04-11 11:37:30.000000000 -0400
+++ mingw-w64-v4.0.2-patched/mingw-w64-crt/math/modfl.c	2015-05-07 11:05:57.000000000 -0400
@@ -21,7 +21,7 @@
     "fldcw (%%rsp)\n"
     "frndint\n"
     "fldcw 4(%%rsp)\n"
-    "addq $8, %%rsp\n" : "=t" (int_part) : "0" (value)); /* round */
+    "addq $8, %%rsp\n" : "=t" (int_part) : "0" (value) : "eax"); /* round */
 #elif defined(_X86_) || defined(__i386__)
   asm ("push %%eax\n\tsubl $8, %%esp\n"
     "fnstcw 4(%%esp)\n"
diff -ru mingw-w64-v4.0.2/mingw-w64-crt/math/modf.c mingw-w64-v4.0.2-patched/mingw-w64-crt/math/modf.c
--- mingw-w64-v4.0.2/mingw-w64-crt/math/modf.c	2015-04-11 11:37:30.000000000 -0400
+++ mingw-w64-v4.0.2-patched/mingw-w64-crt/math/modf.c	2015-05-07 11:05:57.000000000 -0400
@@ -21,7 +21,7 @@
     "fldcw (%%rsp)\n"
     "frndint\n"
     "fldcw 4(%%rsp)\n"
-    "addq $8, %%rsp\n" : "=t" (int_part) : "0" (value)); /* round */
+    "addq $8, %%rsp\n" : "=t" (int_part) : "0" (value) : "eax"); /* round */
 #elif defined(_X86_) || defined(__i386__)
   asm ("push %%eax\n\tsubl $8, %%esp\n"
     "fnstcw 4(%%esp)\n"
diff -ru mingw-w64-v4.0.2/mingw-w64-crt/math/modff.c mingw-w64-v4.0.2-patched/mingw-w64-crt/math/modff.c
--- mingw-w64-v4.0.2/mingw-w64-crt/math/modff.c	2015-04-11 11:37:30.000000000 -0400
+++ mingw-w64-v4.0.2-patched/mingw-w64-crt/math/modff.c	2015-05-07 11:05:57.000000000 -0400
@@ -22,7 +22,7 @@
     "fldcw (%%rsp)\n"
     "frndint\n"
     "fldcw 4(%%rsp)\n"
-    "addq $8, %%rsp\n" : "=t" (int_part) : "0" (value)); /* round */
+    "addq $8, %%rsp\n" : "=t" (int_part) : "0" (value) : "eax"); /* round */
 #elif defined(_X86_) || defined(__i386__)
   asm ("push %%eax\n\tsubl $8, %%esp\n"
     "fnstcw 4(%%esp)\n"