diff --git a/arch/um/include/sysdep-i386/ptrace.h b/arch/um/include/sysdep-i386/ptrace.h
index 6670cc992ecb55de9c98e9ca19131c6c1a556592..52b398bcafcf73ad738cbff7d6e0bd754eb7ddae 100644
--- a/arch/um/include/sysdep-i386/ptrace.h
+++ b/arch/um/include/sysdep-i386/ptrace.h
@@ -75,7 +75,7 @@ union uml_pt_regs {
 #endif
 #ifdef UML_CONFIG_MODE_SKAS
 	struct skas_regs {
-		unsigned long regs[HOST_FRAME_SIZE];
+		unsigned long regs[MAX_REG_NR];
 		unsigned long fp[HOST_FP_SIZE];
 		unsigned long xfp[HOST_XFP_SIZE];
                 struct faultinfo faultinfo;
diff --git a/arch/um/include/sysdep-x86_64/ptrace.h b/arch/um/include/sysdep-x86_64/ptrace.h
index 617bb9efc93424ef59fb413cf0394f7266ad12d1..66cb400c2c92bb18e103036ff299e76b52512b96 100644
--- a/arch/um/include/sysdep-x86_64/ptrace.h
+++ b/arch/um/include/sysdep-x86_64/ptrace.h
@@ -108,7 +108,7 @@ union uml_pt_regs {
 		 * file size, while i386 uses FRAME_SIZE.  Therefore, we need
 		 * to use UM_FRAME_SIZE here instead of HOST_FRAME_SIZE.
 		 */
-		unsigned long regs[UM_FRAME_SIZE];
+		unsigned long regs[MAX_REG_NR];
 		unsigned long fp[HOST_FP_SIZE];
                 struct faultinfo faultinfo;
 		long syscall;