diff --git a/racket/src/ChezScheme/c/pb.c b/racket/src/ChezScheme/c/pb.c
index bfb0911c6a..f561d2a50e 100644
--- a/racket/src/ChezScheme/c/pb.c
+++ b/racket/src/ChezScheme/c/pb.c
@@ -535,7 +535,16 @@ void S_pb_interp(ptr tc, void *bytecode) {
       regs[INSTR_drr_dest(instr)] = *(int8_t *)TO_VOIDP(regs[INSTR_drr_reg1(instr)] + regs[INSTR_drr_reg2(instr)]);
       break;
     case pb_ld_op_pb_int8_pb_immediate:
+#if defined(__arm__)
+      /* Complicated load to avoid an internal compiler error from an old gcc on Raspbian: */
+      {
+        int8_t v;
+        memcpy(&v, TO_VOIDP(regs[INSTR_dri_reg(instr)] + INSTR_dri_imm(instr)), sizeof(int8_t));
+        regs[INSTR_dri_dest(instr)] = v;
+      }
+#else
       regs[INSTR_dri_dest(instr)] = *(int8_t *)TO_VOIDP(regs[INSTR_dri_reg(instr)] + INSTR_dri_imm(instr));
+#endif
       break;
     case pb_ld_op_pb_uint8_pb_register:
       regs[INSTR_drr_dest(instr)] = *(uint8_t *)TO_VOIDP(regs[INSTR_drr_reg1(instr)] + regs[INSTR_drr_reg2(instr)]);
diff --git a/racket/src/ChezScheme/c/version.h b/racket/src/ChezScheme/c/version.h
index c9bdf2fd5d..3352cabc78 100644
--- a/racket/src/ChezScheme/c/version.h
+++ b/racket/src/ChezScheme/c/version.h
@@ -469,7 +469,7 @@ typedef char tputsputcchar;
 /* Use "/dev/urandom" everywhere except Windows */
 #define USE_DEV_URANDOM_UUID
 
-#if defined(__arm64__) || defined(__arm32__)
+#if defined(__arm64__) || defined(__arm__)
 # if arm_isa_version == 6
 #  define STORE_FENCE() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" : : "r" (0) : "memory")
 # else