diff --git a/GL/texture.c b/GL/texture.c
index 143aef0..8a6c701 100644
--- a/GL/texture.c
+++ b/GL/texture.c
@@ -1398,7 +1398,7 @@ void APIENTRY glTexParameteri(GLenum target, GLenum pname, GLint param) {
     }
 }
 
-void APIENTRY glTexParameterf(GLenum target, GLenum pname, GLint param) {
+void APIENTRY glTexParameterf(GLenum target, GLenum pname, GLfloat param) {
     glTexParameteri(target, pname, (GLint) param);
 }
 
diff --git a/include/GL/gl.h b/include/GL/gl.h
index c456c86..a85a6c1 100644
--- a/include/GL/gl.h
+++ b/include/GL/gl.h
@@ -511,6 +511,7 @@ GLAPI void APIENTRY glBlendFunc(GLenum sfactor, GLenum dfactor);
 
 /* Texturing */
 GLAPI void APIENTRY glTexParameteri(GLenum target, GLenum pname, GLint param);
+GLAPI void APIENTRY glTexParameterf(GLenum target, GLenum pname, GLfloat param);
 GLAPI void APIENTRY glTexEnvi(GLenum target, GLenum pname, GLint param);
 GLAPI void APIENTRY glTexEnvf(GLenum target, GLenum pname, GLfloat param);