diff --git a/src/helpers.cpp b/src/helpers.cpp
index 949326686..7439c70ed 100644
--- a/src/helpers.cpp
+++ b/src/helpers.cpp
@@ -359,7 +359,7 @@ uint16_t Helpers::atoint(const char * value) {
 
 // rounds a number to 2 decimal places
 // example: round2(3.14159) -> 3.14
-double Helpers::round2(double value, const uint8_t divider) {
+float Helpers::round2(float value, const uint8_t divider) {
     uint8_t div = (divider ? divider : 1); // prevent div-by-zero
 
     if (value >= 0) {
diff --git a/src/helpers.h b/src/helpers.h
index b78d62f5e..9a3518622 100644
--- a/src/helpers.h
+++ b/src/helpers.h
@@ -50,7 +50,7 @@ class Helpers {
     static uint16_t    atoint(const char * value);
     static bool        check_abs(const int32_t i);
     static uint32_t    abs(const int32_t i);
-    static double      round2(double value, const uint8_t divider);
+    static float       round2(float value, const uint8_t divider);
     static std::string toLower(std::string const & s);
     static std::string toUpper(std::string const & s);