diff --git a/source/src/tools.cpp b/source/src/tools.cpp
index 162847ff..afad080e 100644
--- a/source/src/tools.cpp
+++ b/source/src/tools.cpp
@@ -277,5 +277,5 @@ bool isbigendian()
     return !(*((char *)(&one)));
 }
 
-inline float round(float x) { return floor(x + 0.5f); }
+float round(float x) { return floor(x + 0.5f); }
 
diff --git a/source/src/tools.h b/source/src/tools.h
index 30e0418b..6f9228f0 100644
--- a/source/src/tools.h
+++ b/source/src/tools.h
@@ -508,7 +508,7 @@ extern bool cmpb(void *b, int n, enet_uint32 c);
 extern bool cmpf(char *fn, enet_uint32 c);
 extern void endianswap(void *, int, int);
 extern bool isbigendian();
-extern inline float round(float x);
+extern float round(float x);
 
 #endif