diff --git a/include/libbej/bej_dictionary.h b/include/libbej/bej_dictionary.h
index 81d77dc..807abee 100644
--- a/include/libbej/bej_dictionary.h
+++ b/include/libbej/bej_dictionary.h
@@ -57,7 +57,7 @@
  *
  * @return the offset to the first property.
  */
-uint16_t bejDictGetPropertyHeadOffset();
+uint16_t bejDictGetPropertyHeadOffset(void);
 
 /**
  * @brief Get the offset of the first annotated property in an annoation
@@ -66,7 +66,7 @@
  * @return the offset to the first annotated property in an annoation
  * dictionary.
  */
-uint16_t bejDictGetFirstAnnotatedPropertyOffset();
+uint16_t bejDictGetFirstAnnotatedPropertyOffset(void);
 
 /**
  * @brief Get the property related to the given sequence number.
diff --git a/src/bej_dictionary.c b/src/bej_dictionary.c
index c0481b3..15bbc89 100644
--- a/src/bej_dictionary.c
+++ b/src/bej_dictionary.c
@@ -61,13 +61,13 @@
     return true;
 }
 
-uint16_t bejDictGetPropertyHeadOffset()
+uint16_t bejDictGetPropertyHeadOffset(void)
 {
     // First property is present soon after the dictionary header.
     return sizeof(struct BejDictionaryHeader);
 }
 
-uint16_t bejDictGetFirstAnnotatedPropertyOffset()
+uint16_t bejDictGetFirstAnnotatedPropertyOffset(void)
 {
     // The first property available is the "Annotations" set which is the parent
     // for all properties. Next immediate property is the first property we