diff --git a/libswscale/format.c b/libswscale/format.c
index b859af7b04..e4c1348b90 100644
--- a/libswscale/format.c
+++ b/libswscale/format.c
@@ -483,7 +483,7 @@ static int infer_trc_ref(SwsColor *csp, const SwsColor *ref)
     return 1;
 }
 
-int ff_infer_colors(SwsColor *src, SwsColor *dst)
+bool ff_infer_colors(SwsColor *src, SwsColor *dst)
 {
     int incomplete = 0;
 
diff --git a/libswscale/format.h b/libswscale/format.h
index 11b4345f7c..3b6d745159 100644
--- a/libswscale/format.h
+++ b/libswscale/format.h
@@ -21,6 +21,8 @@
 #ifndef SWSCALE_FORMAT_H
 #define SWSCALE_FORMAT_H
 
+#include <stdbool.h>
+
 #include "libavutil/csp.h"
 #include "libavutil/pixdesc.h"
 
@@ -129,7 +131,7 @@ static inline int ff_fmt_align(enum AVPixelFormat fmt)
 
 int ff_test_fmt(const SwsFormat *fmt, int output);
 
-/* Returns 1 if the formats are incomplete, 0 otherwise */
-int ff_infer_colors(SwsColor *src, SwsColor *dst);
+/* Returns true if the formats are incomplete, false otherwise */
+bool ff_infer_colors(SwsColor *src, SwsColor *dst);
 
 #endif /* SWSCALE_FORMAT_H */
diff --git a/libswscale/graph.h b/libswscale/graph.h
index 6bbe87891a..0630b31ce6 100644
--- a/libswscale/graph.h
+++ b/libswscale/graph.h
@@ -21,6 +21,8 @@
 #ifndef SWSCALE_GRAPH_H
 #define SWSCALE_GRAPH_H
 
+#include <stdbool.h>
+
 #include "libavutil/slicethread.h"
 #include "swscale.h"
 #include "format.h"
@@ -109,8 +111,8 @@ typedef struct SwsGraph {
     SwsContext *ctx;
     AVSliceThread *slicethread;
     int num_threads; /* resolved at init() time */
-    int incomplete;  /* set during init() if formats had to be inferred */
-    int noop;        /* set during init() if the graph is a no-op */
+    bool incomplete; /* set during init() if formats had to be inferred */
+    bool noop;       /* set during init() if the graph is a no-op */
 
     /** Sorted sequence of filter passes to apply */
     SwsPass **passes;