diff --git a/target/mips/cpu.h b/target/mips/cpu.h
index 37703ea011..3b3509ccba 100644
--- a/target/mips/cpu.h
+++ b/target/mips/cpu.h
@@ -811,7 +811,7 @@ struct CPUMIPSState {
     int CCRes; /* Cycle count resolution/divisor */
     uint32_t CP0_Status_rw_bitmask; /* Read/write bits in CP0_Status */
     uint32_t CP0_TCStatus_rw_bitmask; /* Read/write bits in CP0_TCStatus */
-    int insn_flags; /* Supported instruction set */
+    uint64_t insn_flags; /* Supported instruction set */
 
     /* Fields up to this point are cleared by a CPU reset */
     struct {} end_reset_fields;
diff --git a/target/mips/internal.h b/target/mips/internal.h
index e41051f8e6..bfe83ee613 100644
--- a/target/mips/internal.h
+++ b/target/mips/internal.h
@@ -59,7 +59,7 @@ struct mips_def_t {
     int32_t CP0_PageGrain_rw_bitmask;
     int32_t CP0_PageGrain;
     target_ulong CP0_EBaseWG_rw_bitmask;
-    int insn_flags;
+    uint64_t insn_flags;
     enum mips_mmu_types mmu_type;
 };
 
diff --git a/target/mips/translate.c b/target/mips/translate.c
index a309df7494..c91c541b55 100644
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -1986,7 +1986,7 @@ typedef struct DisasContext {
     target_ulong saved_pc;
     target_ulong page_start;
     uint32_t opcode;
-    int insn_flags;
+    uint64_t insn_flags;
     int32_t CP0_Config1;
     int32_t CP0_Config3;
     int32_t CP0_Config5;
@@ -2409,7 +2409,7 @@ static inline void check_dspr2(DisasContext *ctx)
 
 /* This code generates a "reserved instruction" exception if the
    CPU does not support the instruction set corresponding to flags. */
-static inline void check_insn(DisasContext *ctx, int flags)
+static inline void check_insn(DisasContext *ctx, uint64_t flags)
 {
     if (unlikely(!(ctx->insn_flags & flags))) {
         generate_exception_end(ctx, EXCP_RI);
@@ -2419,7 +2419,7 @@ static inline void check_insn(DisasContext *ctx, int flags)
 /* This code generates a "reserved instruction" exception if the
    CPU has corresponding flag set which indicates that the instruction
    has been removed. */
-static inline void check_insn_opc_removed(DisasContext *ctx, int flags)
+static inline void check_insn_opc_removed(DisasContext *ctx, uint64_t flags)
 {
     if (unlikely(ctx->insn_flags & flags)) {
         generate_exception_end(ctx, EXCP_RI);