diff --git a/darwin/Platform.c b/darwin/Platform.c
index b7e7a0bae..ebfc5de9e 100644
--- a/darwin/Platform.c
+++ b/darwin/Platform.c
@@ -404,7 +404,7 @@ bool Platform_getDiskIO(DiskIOData* data) {
    if (IOServiceGetMatchingServices(iokit_port, IOServiceMatching("IOBlockStorageDriver"), &drive_list))
       return false;
 
-   unsigned long long int read_sum = 0, write_sum = 0, timeSpend_sum = 0;
+   uint64_t read_sum = 0, write_sum = 0, timeSpend_sum = 0;
    uint64_t numDisks = 0;
 
    io_registry_entry_t drive;
@@ -437,7 +437,7 @@ bool Platform_getDiskIO(DiskIOData* data) {
       numDisks++;
 
       CFNumberRef number;
-      unsigned long long int value;
+      uint64_t value;
 
       /* Get bytes read */
       number = (CFNumberRef) CFDictionaryGetValue(statistics, CFSTR(kIOBlockStorageDriverStatisticsBytesReadKey));
diff --git a/freebsd/Platform.c b/freebsd/Platform.c
index a2392db26..0464c6fe8 100644
--- a/freebsd/Platform.c
+++ b/freebsd/Platform.c
@@ -312,7 +312,7 @@ bool Platform_getDiskIO(DiskIOData* data) {
 
    int count = current.dinfo->numdevs;
 
-   unsigned long long int bytesReadSum = 0, bytesWriteSum = 0, timeSpendSum = 0;
+   uint64_t bytesReadSum = 0, bytesWriteSum = 0, timeSpendSum = 0;
    uint64_t numDisks = 0;
 
    // get data
diff --git a/linux/Platform.c b/linux/Platform.c
index 39c64066a..eec5d1bf2 100644
--- a/linux/Platform.c
+++ b/linux/Platform.c
@@ -613,7 +613,7 @@ bool Platform_getDiskIO(DiskIOData* data) {
 
    char lastTopDisk[32] = { '\0' };
 
-   unsigned long long int read_sum = 0, write_sum = 0, timeSpend_sum = 0;
+   uint64_t read_sum = 0, write_sum = 0, timeSpend_sum = 0;
    uint64_t numDisks = 0;
 
    char lineBuffer[256];