diff --git a/src/arm/midr.c b/src/arm/midr.c
index 29d9a85..005dbe8 100644
--- a/src/arm/midr.c
+++ b/src/arm/midr.c
@@ -514,7 +514,7 @@ void print_debug(struct cpuInfo* cpu) {
   }
 
   if (cpu->feat->SVE || cpu->feat->SVE2) {
-    printf("- cntb: %ld\n", cpu->feat->cntb);
+    printf("- cntb: %lld\n", cpu->feat->cntb);
   }
 
   #if defined(__APPLE__) || defined(__MACH__)
diff --git a/src/common/cpu.h b/src/common/cpu.h
index 1f31bcd..aabcee7 100644
--- a/src/common/cpu.h
+++ b/src/common/cpu.h
@@ -126,7 +126,7 @@ struct features {
   bool CRC32;
   bool SVE;
   bool SVE2;
-  uint32_t cntb;
+  uint64_t cntb;
 #endif  
 };