diff -ur a/jamvm-1.5.4/src/os/linux/i386/init.c b/jamvm-1.5.4/src/os/linux/i386/init.c
--- a/jamvm-1.5.4/src/os/linux/i386/init.c	2009-12-31 19:40:48.000000000 -0100
+++ b/jamvm-1.5.4/src/os/linux/i386/init.c	2015-01-31 22:57:09.558345144 -0100
@@ -19,18 +19,18 @@
  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
-#include <fpu_control.h>
+#include <fenv.h>
 
 /* Change floating point precision to double (64-bit) from
  * the extended (80-bit) Linux default. */
 
 void setDoublePrecision() {
-    fpu_control_t cw;
+    fenv_t fenv;
 
-    _FPU_GETCW(cw);
-    cw &= ~_FPU_EXTENDED;
-    cw |= _FPU_DOUBLE;
-    _FPU_SETCW(cw);
+    fegetenv(&fenv);
+    fenv.__control_word &= ~0x300; /* _FPU_EXTENDED */
+    fenv.__control_word |= 0x200; /* _FPU_DOUBLE */
+    fesetenv(&fenv);
 }
 
 void initialisePlatform() {
diff -ur a/jamvm-1.5.4/src/os/linux/x86_64/init.c b/jamvm-1.5.4/src/os/linux/x86_64/init.c
--- a/jamvm-1.5.4/src/os/linux/x86_64/init.c	2009-12-31 19:40:48.000000000 -0100
+++ b/jamvm-1.5.4/src/os/linux/x86_64/init.c	2015-01-31 22:57:03.257423916 -0100
@@ -19,9 +19,7 @@
  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
-#ifdef __linux__
-#include <fpu_control.h>
-#endif
+#include <fenv.h>
 
 /* Change the x87 FPU precision to double (64-bit) from the extended
    (80-bit) Linux default.  Note, unlike on i386, my testcases pass
@@ -30,14 +28,12 @@
 */
 
 void setDoublePrecision() {
-#ifdef __linux__
-    fpu_control_t cw;
+    fenv_t fenv;
 
-    _FPU_GETCW(cw);
-    cw &= ~_FPU_EXTENDED;
-    cw |= _FPU_DOUBLE;
-    _FPU_SETCW(cw);
-#endif
+    fegetenv(&fenv);
+    fenv.__control_word &= ~0x300; /*_FPU_EXTENDED */
+    fenv.__control_word |= 0x200; /*_FPU_DOUBLE */
+    fesetenv(&fenv);
 }
 
 void initialisePlatform() {