diff --git a/src/common/sysdefs.h b/src/common/sysdefs.h
index f89239a0..97a1c045 100644
--- a/src/common/sysdefs.h
+++ b/src/common/sysdefs.h
@@ -50,7 +50,7 @@
 // we can work without inttypes.h thanks to Autoconf tests.
 #ifndef UINT32_C
 #	if UINT_MAX != 4294967295U
-#		error UINT32_C is not defined and unsiged int is not 32-bit.
+#		error UINT32_C is not defined and unsigned int is not 32-bit.
 #	endif
 #	define UINT32_C(n) n ## U
 #endif