diff --git a/src/utils/smallut.cpp b/src/utils/smallut.cpp
index 9f550b6a..d41aef58 100644
--- a/src/utils/smallut.cpp
+++ b/src/utils/smallut.cpp
@@ -670,7 +670,7 @@ bool pcSubst(const string& in, string& out, const map<string, string>& subs)
     }
     return true;
 }
-inline static int ulltorbuf(unsigned long long val, char *rbuf)
+inline static int ulltorbuf(uint64_t val, char *rbuf)
 {
     int idx;
     for (idx = 0; val; idx++) {
@@ -690,7 +690,7 @@ inline static void ullcopyreverse(const char *rbuf, string& buf, int idx)
     }
 }
 
-void ulltodecstr(unsigned long long val, string& buf)
+void ulltodecstr(uint64_t val, string& buf)
 {
     buf.clear();
     if (val == 0) {
@@ -705,7 +705,7 @@ void ulltodecstr(unsigned long long val, string& buf)
     return;
 }
 
-void lltodecstr(long long val, string& buf)
+void lltodecstr(int64_t val, string& buf)
 {
     buf.clear();
     if (val == 0) {
@@ -730,14 +730,14 @@ void lltodecstr(long long val, string& buf)
     return;
 }
 
-string lltodecstr(long long val)
+string lltodecstr(int64_t val)
 {
     string buf;
     lltodecstr(val, buf);
     return buf;
 }
 
-string ulltodecstr(unsigned long long val)
+string ulltodecstr(uint64_t val)
 {
     string buf;
     ulltodecstr(val, buf);
@@ -745,7 +745,7 @@ string ulltodecstr(unsigned long long val)
 }
 
 // Convert byte count into unit (KB/MB...) appropriate for display
-string displayableBytes(off_t size)
+string displayableBytes(int64_t size)
 {
     const char *unit;
 
diff --git a/src/utils/smallut.h b/src/utils/smallut.h
index 1281a6f9..6a16b529 100644
--- a/src/utils/smallut.h
+++ b/src/utils/smallut.h
@@ -19,6 +19,7 @@
 #define _SMALLUT_H_INCLUDED_
 
 #include <sys/types.h>
+#include <stdint.h>
 
 #include <string>
 #include <vector>
@@ -162,13 +163,13 @@ extern std::string escapeShell(const std::string& str);
 extern std::string truncate_to_word(const std::string& input,
                                     std::string::size_type maxlen);
 
-void ulltodecstr(unsigned long long val, std::string& buf);
-void lltodecstr(long long val, std::string& buf);
-std::string lltodecstr(long long val);
-std::string ulltodecstr(unsigned long long val);
+void ulltodecstr(uint64_t val, std::string& buf);
+void lltodecstr(int64_t val, std::string& buf);
+std::string lltodecstr(int64_t val);
+std::string ulltodecstr(uint64_t val);
 
 /** Convert byte count into unit (KB/MB...) appropriate for display */
-std::string displayableBytes(off_t size);
+std::string displayableBytes(int64_t size);
 
 /** Break big string into lines */
 std::string breakIntoLines(const std::string& in, unsigned int ll = 100,