diff --git a/linux-user/alpha/target_signal.h b/linux-user/alpha/target_signal.h
index b83797281c..0b90d3a897 100644
--- a/linux-user/alpha/target_signal.h
+++ b/linux-user/alpha/target_signal.h
@@ -92,4 +92,10 @@ typedef struct target_sigaltstack {
 #define TARGET_GEN_SUBRNG7     -25
 
 #define TARGET_ARCH_HAS_SETUP_FRAME
+
+/* bit-flags */
+#define TARGET_SS_AUTODISARM (1U << 31) /* disable sas during sighandling */
+/* mask for all SS_xxx flags */
+#define TARGET_SS_FLAG_BITS  TARGET_SS_AUTODISARM
+
 #endif /* ALPHA_TARGET_SIGNAL_H */
diff --git a/linux-user/generic/signal.h b/linux-user/generic/signal.h
index e1083f8fba..943bc1a1e2 100644
--- a/linux-user/generic/signal.h
+++ b/linux-user/generic/signal.h
@@ -54,4 +54,10 @@
 #define TARGET_SIG_BLOCK          0    /* for blocking signals */
 #define TARGET_SIG_UNBLOCK        1    /* for unblocking signals */
 #define TARGET_SIG_SETMASK        2    /* for setting the signal mask */
+
+/* bit-flags */
+#define TARGET_SS_AUTODISARM (1U << 31) /* disable sas during sighandling */
+/* mask for all SS_xxx flags */
+#define TARGET_SS_FLAG_BITS  TARGET_SS_AUTODISARM
+
 #endif
diff --git a/linux-user/hppa/target_signal.h b/linux-user/hppa/target_signal.h
index c52a3ea579..7f525362e9 100644
--- a/linux-user/hppa/target_signal.h
+++ b/linux-user/hppa/target_signal.h
@@ -66,4 +66,9 @@ typedef struct target_sigaltstack {
 #define TARGET_MINSIGSTKSZ	2048
 #define TARGET_SIGSTKSZ		8192
 
+/* bit-flags */
+#define TARGET_SS_AUTODISARM (1U << 31) /* disable sas during sighandling */
+/* mask for all SS_xxx flags */
+#define TARGET_SS_FLAG_BITS  TARGET_SS_AUTODISARM
+
 #endif /* HPPA_TARGET_SIGNAL_H */
diff --git a/linux-user/mips/target_signal.h b/linux-user/mips/target_signal.h
index fa4084a99d..d521765f6b 100644
--- a/linux-user/mips/target_signal.h
+++ b/linux-user/mips/target_signal.h
@@ -73,4 +73,10 @@ typedef struct target_sigaltstack {
 /* compare linux/arch/mips/kernel/signal.c:setup_frame() */
 #define TARGET_ARCH_HAS_SETUP_FRAME
 #endif
+
+/* bit-flags */
+#define TARGET_SS_AUTODISARM (1U << 31) /* disable sas during sighandling */
+/* mask for all SS_xxx flags */
+#define TARGET_SS_FLAG_BITS  TARGET_SS_AUTODISARM
+
 #endif /* MIPS_TARGET_SIGNAL_H */
diff --git a/linux-user/mips64/target_signal.h b/linux-user/mips64/target_signal.h
index f1f0ed7f70..d857c55e4c 100644
--- a/linux-user/mips64/target_signal.h
+++ b/linux-user/mips64/target_signal.h
@@ -67,6 +67,11 @@ typedef struct target_sigaltstack {
 #define TARGET_MINSIGSTKSZ    2048
 #define TARGET_SIGSTKSZ       8192
 
+/* bit-flags */
+#define TARGET_SS_AUTODISARM (1U << 31) /* disable sas during sighandling */
+/* mask for all SS_xxx flags */
+#define TARGET_SS_FLAG_BITS  TARGET_SS_AUTODISARM
+
 #if defined(TARGET_ABI_MIPSO32)
 /* compare linux/arch/mips/kernel/signal.c:setup_frame() */
 #define TARGET_ARCH_HAS_SETUP_FRAME
diff --git a/linux-user/sparc/target_signal.h b/linux-user/sparc/target_signal.h
index 1b10d1490f..911a3f5af5 100644
--- a/linux-user/sparc/target_signal.h
+++ b/linux-user/sparc/target_signal.h
@@ -68,4 +68,10 @@ typedef struct target_sigaltstack {
 #define TARGET_SIGSTKSZ		16384
 
 #define TARGET_ARCH_HAS_SETUP_FRAME
+
+/* bit-flags */
+#define TARGET_SS_AUTODISARM (1U << 31) /* disable sas during sighandling */
+/* mask for all SS_xxx flags */
+#define TARGET_SS_FLAG_BITS  TARGET_SS_AUTODISARM
+
 #endif /* SPARC_TARGET_SIGNAL_H */