diff --git a/CMakeLists.txt b/CMakeLists.txt
index 711fc6e..f5ceef4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -84,7 +84,11 @@ if( NOT IMLIB_BUILD_WITH_X )
 endif( NOT IMLIB_BUILD_WITH_X )
 
 
-add_definitions( -D_POSIX_C_SOURCE=200809L -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_WITH_GETLINE )
+add_definitions( -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_WITH_GETLINE )
+
+if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
+  add_definitions( -D_POSIX_C_SOURCE=200809L )
+endif(CMAKE_SYSTEM_NAME STREQUAL "Linux")
 
 
 include_directories( ${PROJECT_BINARY_DIR}
diff --git a/src/util/area.c b/src/util/area.c
index 38a9fa1..5e04caa 100644
--- a/src/util/area.c
+++ b/src/util/area.c
@@ -1173,7 +1173,7 @@ double compute_control_point_offset(Area *area, Offset *offset)
     double height = element_area->height;
     double radius = sqrt(element_area->width * element_area->width + element_area->height * element_area->height) / 2.0;
 
-    double left, top;
+    double left = 0, top = 0;
     if (offset->element == ELEMENT_SELF) {
         left = 0;
         top = 0;
diff --git a/src/util/gradient.h b/src/util/gradient.h
index b9fede1..413ea3b 100644
--- a/src/util/gradient.h
+++ b/src/util/gradient.h
@@ -67,11 +67,10 @@ void cleanup_gradient(GradientClass *g);
 // Gradient instances associated to Areas
 
 struct Area;
-typedef struct Area Area;
 
 typedef struct GradientInstance {
     GradientClass *gradient_class;
-    Area *area;
+    struct Area *area;
     cairo_pattern_t *pattern;
 } GradientInstance;