diff --git a/programs/fileio.c b/programs/fileio.c
index b29295586..b5beb145c 100644
--- a/programs/fileio.c
+++ b/programs/fileio.c
@@ -1598,16 +1598,16 @@ FIO_compressFilename_internal(FIO_ctx_t* const fCtx,
                 (unsigned long long)readsize, (unsigned long long) compressedfilesize,
                 dstFileName);
         } else {
-			char input_size_str[8] = "";
-			human_size((unsigned long long) readsize, input_size_str);
+			char inputSizeStr[8] = "";
+			humanSize((unsigned long long) readsize, inputSizeStr);
 
-			char output_size_str[8] = "";
-			human_size((unsigned long long) compressedfilesize, output_size_str);
+			char outputSizeStr[8] = "";
+			humanSize((unsigned long long) compressedfilesize, outputSizeStr);
 
             DISPLAYLEVEL(2,"%-20s :%6.2f%%   (%s => %s, %s) \n",
                 srcFileName,
                 (double)compressedfilesize / (double)readsize * 100,
-                input_size_str, output_size_str,
+                inputSizeStr, outputSizeStr,
                 dstFileName);
         }
     }
diff --git a/programs/util.c b/programs/util.c
index d942d3732..5aec11184 100644
--- a/programs/util.c
+++ b/programs/util.c
@@ -121,7 +121,7 @@ int UTIL_requireUserConfirmation(const char* prompt, const char* abortMsg,
 *  Functions
 ***************************************/
 
-char* human_size(long size, char* str) {
+char* humanSize(long size, char* str) {
 	if (size > 1125899906842624L) {
 		snprintf(str, 7, "%.1fP", (float)size / 1125899906842624L);
 	} else if (size > 1099511627776L) {
diff --git a/programs/util.h b/programs/util.h
index 415b01f1b..aaaf2522c 100644
--- a/programs/util.h
+++ b/programs/util.h
@@ -122,7 +122,7 @@ int UTIL_requireUserConfirmation(const char* prompt, const char* abortMsg, const
 #define STRDUP(s) strdup(s)
 #endif
 
-char* human_size(long size, char* str);
+char* humanSize(long size, char* str);
 
 /**
  * Calls platform's equivalent of stat() on filename and writes info to statbuf.