diff --git a/Include/internal/pycore_pymath.h b/Include/internal/pycore_pymath.h
index 4fcac3aab8bf51..f66325aa59c4c9 100644
--- a/Include/internal/pycore_pymath.h
+++ b/Include/internal/pycore_pymath.h
@@ -146,17 +146,17 @@ extern void _Py_set_387controlword(unsigned short);
     unsigned int old_fpcr, new_fpcr
 #define _Py_SET_53BIT_PRECISION_START                                   \
     do {                                                                \
-        __asm__ ("fmove.l %%fpcr,%0" : "=g" (old_fpcr));                \
+        __asm__ ("fmove.l %%fpcr,%0" : "=dm" (old_fpcr));               \
         /* Set double precision / round to nearest.  */                 \
         new_fpcr = (old_fpcr & ~0xf0) | 0x80;                           \
         if (new_fpcr != old_fpcr) {                                     \
-              __asm__ volatile ("fmove.l %0,%%fpcr" : : "g" (new_fpcr));\
+            __asm__ volatile ("fmove.l %0,%%fpcr" : : "dm" (new_fpcr)); \
         }                                                               \
     } while (0)
 #define _Py_SET_53BIT_PRECISION_END                                     \
     do {                                                                \
         if (new_fpcr != old_fpcr) {                                     \
-            __asm__ volatile ("fmove.l %0,%%fpcr" : : "g" (old_fpcr));  \
+            __asm__ volatile ("fmove.l %0,%%fpcr" : : "dm" (old_fpcr)); \
         }                                                               \
     } while (0)
 #endif
diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2025-12-08-13-04-37.gh-issue-142343.BTAyML.rst b/Misc/NEWS.d/next/Core_and_Builtins/2025-12-08-13-04-37.gh-issue-142343.BTAyML.rst
new file mode 100644
index 00000000000000..9da936c2a6f3bd
--- /dev/null
+++ b/Misc/NEWS.d/next/Core_and_Builtins/2025-12-08-13-04-37.gh-issue-142343.BTAyML.rst
@@ -0,0 +1 @@
+Fix SIGILL crash on m68k due to incorrect assembly constraint.
diff --git a/configure b/configure
index 4f9b9b21ca395e..2fe8186d9fb548 100755
--- a/configure
+++ b/configure
@@ -26139,8 +26139,8 @@ main (void)
 {
 
   unsigned int fpcr;
-  __asm__ __volatile__ ("fmove.l %%fpcr,%0" : "=g" (fpcr));
-  __asm__ __volatile__ ("fmove.l %0,%%fpcr" : : "g" (fpcr));
+  __asm__ __volatile__ ("fmove.l %%fpcr,%0" : "=dm" (fpcr));
+  __asm__ __volatile__ ("fmove.l %0,%%fpcr" : : "dm" (fpcr));
 
   ;
   return 0;
diff --git a/configure.ac b/configure.ac
index 046c046ffb5d10..25a00ce52e57c9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6133,8 +6133,8 @@ AS_VAR_IF([ac_cv_gcc_asm_for_x87], [yes], [
 AC_CACHE_CHECK([whether we can use gcc inline assembler to get and set mc68881 fpcr], [ac_cv_gcc_asm_for_mc68881], [
 AC_LINK_IFELSE(   [AC_LANG_PROGRAM([[]], [[
   unsigned int fpcr;
-  __asm__ __volatile__ ("fmove.l %%fpcr,%0" : "=g" (fpcr));
-  __asm__ __volatile__ ("fmove.l %0,%%fpcr" : : "g" (fpcr));
+  __asm__ __volatile__ ("fmove.l %%fpcr,%0" : "=dm" (fpcr));
+  __asm__ __volatile__ ("fmove.l %0,%%fpcr" : : "dm" (fpcr));
 ]])],[ac_cv_gcc_asm_for_mc68881=yes],[ac_cv_gcc_asm_for_mc68881=no])
 ])
 AS_VAR_IF([ac_cv_gcc_asm_for_mc68881], [yes], [